#Preform testing instruments

[live-laugh-legolas]

hii!! what about some hcs with the fellowship and musician!reader?

The fellowship x musician!reader

Aragorn:

-He is a musical man

-He’s not the best but his voice doesn’t destroy people eardrums; he enjoys singing, but he focuses on the meaning less so his voice

-So he hums along to whatever you are playing

-And teaches you some songs he knows

-I just love that he helped Bilbo write songs; what a cutie

Legolas:

-He wants to learn

-But he is a little timid about it; he wouldn’t know where to start

-Elvish music is pretty different from other cultures so he would be interested in this new sound

-I think he prefers your excitement about it more than the sound

-Not because you are bad, he is just used to the ethereal voices of elves

-He will request for you to play for him sometimes

Gimli:

-“That was great! Now let me sing you some dwarvish songs- ahem”

-Very loud when he sings

-I recommend earmuffs if you want to keep your eardrums intact

-He sounds fine, but he reaches inhuman levels of volume

Boromir:

-Tries to get you to play at any moment

-He likes to show off how cool and talented you are

-You are his preforming monkey

-Not really but it sometimes feels like he is giving you a quarter to watch you play a little

-He will sing along but this man cannot sing; seriously he is incredibly tone deaf

-I imagine him singing like my sister; every note is in a different key than the last and it’s literally so bad that it’s impressive

Frodo:

-Doesn’t matter where you are playing; he is there listening

-Has run across the Shire to come listen

-Your biggest supporter

-He likes listening to you when you are working out a song; when it isn’t perfect and you keep stopping to change something or you make a mistake

Sam:

-He tries to join in

-He plays the ��drums”

-He’s rarely on beat but it’s the thought and effort that counts

Merry:

-He’s the type to volunteer you to play for people

-Like someone says there needs to be music and he’s like “Oh! I know someone! They’re fantastic!”

-He’s got a musical ear so he is a good person to “test” your music on

Pippin:

-He also is a musician

-He can sing and can play some instruments

-Tries to convince you to start a band with him

-(I would love to know if anyone has any band name ideas)

Gandalf:

-He will hum along with you

-If you write your own music he will add that to his mental playlist to sing on his travels

-He will request you to play or sing something when he feels the mood is down

[ilovemygfbro]

Kantou Yuumen | Pjsk Oc

Physical Traits ~

Age : 15

Height : 5’3” (160 cm)

Weight : 106 lbs

Basic Qualities ~

Pronouns : He/They

School Year : 2nd

Birthday : February 16th

Unit : Crown Metal

Role : Guitarist/Keyboardist

Character Sheet Details ~

Specialty : Quick Learner

Favorite Food : Vanilla cake with strawberries

Hobbies : Gaming, reading, drawing, learning new songs on his instruments, teaching himself dances and choreos

Dislikes : Sudden loud noises, anger, raw carrots, weird textures

Brief Overview ~

Kantou is a part of the free-lancing metal group Crown Metal, preforming as their “jester”. He tends to be a little blunt and forgets to think before he speaks, but he always means well. He’s determined to help him and his band mates find ways to express themselves without the judgement of others. He’s very supportive of his friends and loved ones, tending to put them before even himself.

Quick Facts ~

Kantou was actually born with a different name, but he refuses to tell anyone what it was. Though, he doesn’t mind if they know that it exists.

He’s autistic. It’s more self-diagnosed, because his dad refuses to take him to get tested, but everyone he knows agrees that the diagnosis is correct.

He actually was a Vocaloid fan before he found out about the Sekai, and his favorite singer is Flower!

He refuses to wear shorts, ever. None of his friends can ever remember a time they’ve seen him wearing anything other than pants.

He’s extremely clingy. He’ll grab the sleeve of his friend’s shirt, practically tackle them down out of nowhere — anything you can think of. It’s mainly when he’s excited though.

He collect stuffed animals, and the softer and plushier they are, the better.

[theangrycomet-art]

Loontics Unleashed: Tunnel Vision

The latest band climbing up the charts in Acemtropolis, they are one of the first non-human bands to gain recognition (as well as notoriety) in recent years after winning a record label with Acme Records in 2768.

They're technically a rock band, though they tend to explore genres.

They are scheduled to preform at the 2774 Basherball Championship halftime show, despite the more recent threats sent to them.

Lore Below:

Don't mess with any of the band member's equipment ESPECIALLY their instruments. Jax get's particularly nasty when her guitar is touched.

Dakota Frog

performer name: Lily Pad

she/her

lead vocals/bass

Writes most of the songs with Jax

in charge of choreography

Descendant of Michigan J Frog

used to suffer from severe stage fright so she could only sing in front of one person at a time

luckily she's conquered this fear with Tunnel Vision

cool headed though she isn't above getting into mischief

Jesse Rabbit (Rodger/Jessica Rabbit descendant)

Performer name: Dust Bunny

he/him

Speaks several languages-> translates their songs

Drummer/ male vocals

Descendant of Rodger and Jessica Rabbit

clutsiest of the group, he does the least amount of stunts during their shows

smooth talker- he manages their contracts and ensures they get paid fairly

acts dumber than he is so people underestimate him

Marcy the Martian

Performer Name: Asteroid Bebe

she/her

Proper Title: 2nd Princess Mihl’ah Tyr'ah,

Keyboardist/ rapper

sound engineer with Jax

Daughter of Empress Tyr'ahnee and Commander X2, cousins with Melvin

though polite and well-meaning, she is regularly impeded by her short temper (this has improved as she has found an outlet through thier music)

initially visited Earth as a culture study

she's perfectly content to chill on earth for the next century or two

tranlsate's their songs into Martian, giving them a LARGE fandom amongst the Martian Empire

Jacqueline “Jax” E Coyote

performer name: Sandy Lane

she/

9 string guitar/ lead vocals

sound engineer with Marcy

Writes most of the songs with Dakota

See Link^^^

protective over her bandmates, she's usually the one to tell people off if they are crossing a line

Tech's sister

Albums:

2769: Sour Candy (the love song/bittersweet album going over the highs and lows of a relationships)

Tug a War

Heart Murmurs

Eat it Too

Mind over Matter

(I love you, Lady!) Buh bye!

Ladies and Gents

Double Blind Date

My Demons are my Angels

rock cover of “Hello my Baby”

2770: Don’t worry, this is Just a Test (experimental album)

No Martian’s were Harmed in the Making of this Song

What is this thing?

Pliers and Wires (the diffusing bomb song)

Murphy’s Law (The Disaster Song)

Self Destruct Button

Never Have I Ever

Never again

Zap!

Gravity (thou art a heartless bitch)

No Sounds in Space

2772: Open Season (the angry album) 

Count the Teeth

Leash Laws (This Bitch Bites)

Playboy Bunnies (Bad Hare Day)

Bring back the Noise (I hope you Croak)

Four Digits are All I Need (to Slap You)

Swallowing Honeybees

Pelt on the Wall

Feather Duster 

Dynamite in my Piano

2773: Insurance won’t Cover This (direct callout to how the comet situation was addressed)

What’s up, Doc?

Second Skin

You wanna put what in my what?

Arm Cast

Scalpel to the Forehead

Surgery won’t fix This

The Bone Doctor

Empty Vase

Blow my Chest Clean Off

Hospital Fees

Freaks

2774: Highlighter Pack (dedicated to the Loonatics)

Comet 

Start your Engines 

Let’s Jet

On my Radar 

Eye of the Storm

TNT’s the New Ibuprofen 

Dodging Bullets, Throwing Stones

Lab Safety

Highlighter Pack

[ethicallysourcedhumanmeat]

Still mad, listening to the gold star student that gets everything handed to her say with her whole chest 'vocalists should get to do scales with a piano for levels. It's unfair, scales are easier with instrument."

Fuck all the way off, we've had 2 years to learn this. Scales should be easy. Like my only concern with scales is my dyslexia fucking up the formula for altered scales.

I am so sorry but like the hardest thing on vocal levels for this program is the self accompanied original song. This is standard shit she's looking at the other vocalists yo back her up and all I could say was singing scales is standard level testing, RCM expects it too.

You're doing a degree in preformance at a classically based institution next year babe, you have to test at RCM level 10 for that.

we've had our 2nd year levels requirements for almost 2 years.

Scales are so fucking basic,they're memory exercuses. like oh its a lydian scale, we test in the Nashville system so we don't even have to say the note. 1 2 3 #4 5 6 7. Like here's you're first note, sing that note 1 whole step to 2, whole step to 3, whole step to 4 half step to 5, whole step to 6, whole step to 7 half step to 1 and then reverse.

As a graduating vocalist the hardest part of singing a scale that isn't a minor scale is remembering where the half and whole steps are bc major scales are just factory default in your brain.

[scrumptiousharmonypuppy]

Preform Testing Instruments in Saudi Arabia

[komalllsinhh]

Fanout Cables Market 2025-2032

MARKET INSIGHTS

The global Fanout Cables Market size was valued at US$ 1,840 million in 2024 and is projected to reach US$ 3,240 million by 2032, at a CAGR of 8.3% during the forecast period 2025-2032.

Fanout cables are specialized fiber optic cables containing multiple simplex fibers individually sheathed within an outer protective jacket. Unlike distribution cables which bundle tight-buffered fibers together, fanout cables allow easy separation into individual fiber strands for use as patch cords. This design provides superior flexibility and protection, making them ideal for high-density connectivity applications.

The market growth is driven by escalating demand from data centers and FTTH (Fiber-to-the-Home) deployments, where high-bandwidth connectivity solutions are critical. Furthermore, the increasing adoption of 5G networks and cloud computing infrastructure necessitates robust fiber optic components. Key players like Corning and AFL are expanding production capacities to meet this demand, with the less than 8 cores segment expected to maintain dominance due to its cost-effectiveness in standard connectivity applications.

Access Your Free Sample Report Now-https://semiconductorinsight.com/download-sample-report/?product_id=97512

Key Industry Players

Leading Companies Focus on Fiber Innovation and Scalability to Maintain Market Dominance

The global fanout cables market exhibits a semi-consolidated structure with both multinational conglomerates and specialized manufacturers competing for market share. Corning Incorporated emerges as a dominant force, leveraging its proprietary Fiber Optic Ribbon technology and extensive distribution network across North America and Asia-Pacific. The company accounted for approximately 18% of total market revenue in 2023, according to industry estimates.

AFL Global and Hitachi Cable America have strengthened their positions through vertical integration strategies, controlling everything from glass preform production to final cable assembly. These players benefit from established relationships with telecom operators and data center providers, with AFL securing notable contracts with hyperscalers in 2023.

Meanwhile, Jiangsu UNIKIT Optical Technologies represents the growing influence of Chinese manufacturers, having captured 12% of the Asia-Pacific market through competitive pricing and rapid prototyping capabilities. Their expansion mirrors broader industry trends where regional specialists compete effectively against global giants in local markets.

The competitive intensity is further heightened by technological shifts toward higher density configurations. While the less than 8 cores segment remains popular for FTTH deployments, companies like Focc Technology are aggressively developing 12+ core variants to address data center interconnect demands—a segment projected to grow at 9.2% CAGR through 2030.

List of Key Fanout Cable Manufacturers

Corning Incorporated (U.S.)

AFL Global (U.S.)

Hitachi Cable America (U.S.)

Technical Fiber Optics Lines Factory (Russia)

SECOMP International AG (Switzerland)

Focc Technology (China)

Jiangsu UNIKIT Optical Technologies (China)

SAMM Teknoloji (Turkey)

Fiber Hope Optical Communication (China)

Segment Analysis:

By Type

Less than 8 Cores Segment Leads Market Due to Cost-Effectiveness and Versatility in Small-Scale Applications

The market is segmented based on type into:

Less than 8 Cores

Subtypes: 4-core, 6-core, and others

8 Cores-12 Cores

More than 12 Cores

Subtypes: 16-core, 24-core, and others

By Application

Data Center Segment Dominates Owing to Rising Demand for High-Speed Connectivity and Cloud Computing

The market is segmented based on application into:

FTTH (Fiber to the Home)

Testing Instrument

Data Center

Others

By Material

Single-Mode Fiber Segment Holds Major Share Due to Superior Performance in Long-Distance Communication

The market is segmented based on material into:

Single-Mode Fiber

Multi-Mode Fiber

By End-User

Telecommunication Sector Leads with Expanding 5G Infrastructure Investments

The market is segmented based on end-user into:

Telecommunication

IT & Networking

Healthcare

Industrial

Others

Download Your Complimentary Sample Report-https://semiconductorinsight.com/download-sample-report/?product_id=97512

FREQUENTLY ASKED QUESTIONS:

What is the current market size of Global Fanout Cables Market?

-> Fanout Cables Market size was valued at US$ 1,840 million in 2024 and is projected to reach US$ 3,240 million by 2032, at a CAGR of 8.3% during the forecast period 2025-2032.

Which key companies operate in Global Fanout Cables Market?

-> Key players include Technical Fiber Optics Lines Factory, Corning, Hitachi, AFL, Excel, SECOMP, and SAMM Teknoloji, among others.

What are the key growth drivers?

-> Key growth drivers include rising demand for high-speed internet, expansion of 5G networks, and increasing FTTH deployments globally.

Which region dominates the market?

-> Asia-Pacific is the fastest-growing region, driven by China and Japan, while North America remains a technologically advanced market.

What are the emerging trends?

-> Emerging trends include development of high-density fanout cables, integration with smart city infrastructure, and adoption in hyperscale data centers.

About Semiconductor Insight

Established in 2016, Semiconductor Insight specializes in providing comprehensive semiconductor industry research and analysis to support businesses in making well-informed decisions within this dynamic and fast-paced sector. From the beginning, we have been committed to delivering in-depth semiconductor market research, identifying key trends, opportunities, and challenges shaping the global semiconductor industry.                                                            

CONTACT US:

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[+91 8087992013]

help@semiconductorinsight.com

[perfectgroupindia123]

Pet Preform Testing Instruments in West Bengal

[testyourproduct]

Test Your Product Lab Testing Instruments Manufacturers & Supplier

TEST YOUR PRODUCT TM, established in 2014, is a trusted provider of high-precision testing instruments. The vision of TEST YOUR PRODUCT is to meet your material and packaging testing requirements with precision and dedication. Pacorr provides a testing solution for Paper & Packaging Testing, PET & Preform Testing, Plastics, Polymers, Polyfilms & Laminates Testing and Paints, Plaiting Testing. Some of the key products include the Salt Spray Chamber, Bursting Strength Tester, Box Compression Tester, Drop Tester, Melt Flow Index Tester, Bottle Cap Torque Tester, Peel Strength Tester, Ink Abrasion Tester, Tensile Strength Tester, Secure Seal Tester, Bottle Cap Torque Tester, and Digital Bottle Burst Tester and many more each crafted to meet specific testing needs.

[industrialtools]

Polariscope in Uttarakhand

Perfect Group India offers best Polariscope in Uttarakhand instruments for evaluating the quality of PET preforms and plastic products. This technology can detect interior tensions, faults and changes in transparent materials. It guarantees that PET bottles and preforms are stress-free, which increases their strength and longevity. The Polariscope employs polarized light to show mistakes, making quality control simpler for producers. It is frequently used in several sectors, including packaging, drinks, and medicines. Companies can perform thorough testing to prevent product failures and improve packing quality, assuring the end product's safety and reliability.

[tenminutesofscreaming]

lately I think about how much of this would be different if you'd been kind enough to yourself to just be authentically you when we first started talking. it's almost been a year and its strange to think you're just a person I don't really know anymore but, your birthday is still my phone pin.

A lot of that last conversation hinged on my difficulty adjusting to things but when I think about it now I wonder if that was an excuse. you didn't think we'd end up so close so you told white lies that meant so little you didn't even remember them and I filed them away in my brain glad we had these things in common only to gradually find out 7 years later that half these things weren't real. And I know enough about you to not hold it against you, i get it.

I also know enough about you to wonder if it was resentment. You'd said enough times that you sometimes feel resentment when people's lives start getting better. And I feel like maybe that's a more honest reason. My problems and your problems weren't the same anymore. I would be excited to share good things finally happening with my best friend and you called it bragging. I would share videos of my friends preforming songs I knew you liked and you told me you didn’t understand why i thought youd care to see strangers.

I feel like it's a preformance program, like its not bragging, a good show is like acing a test. I felt like having good news was seen as selfish bragging, it felt like resentment.

I dunno its been a year, I'm still grieving 7 years of friendship with a person who was instrumental in all the positive changes I've made in my life. It's hard to not think of them when I can attribute so many of my achievements to simply having met them.

Today is a hard day, my best friend isn't dead but they're no longer present. They don't come up most days, I try not to think too hard on them. they've never done anything with the intention to hurt me.

Still occasionally something will come up and i have to stop myself from saying 'my best friend-" and that kinda sucks a lot.

I don't know, just they're still the first person I want to talk to when things are hard and theyre still the first person I want to tell when things are good. If they ever decided they missed me and weren't too stubborn to reach out I would be there. I think if I won an award or made fuck you money they would het their dues.

Some people will always have space in my heart.

I wish one day they can see themselves in a fraction of the light I always saw them in

[thebrilliantretort]

My OC’s~

Morn

Drow Ranger, The Dark Urge (approx. early 40’s): shy but masks it with RBF and an obvious intimidating aura, extremely unaccustomed to humanoid interaction of any kind due to isolation, struggles to express herself

Pre-Parasite

Raised by an adoptive family in the Underdark until the Urge caused her to kill them at the age of 12

Spent several years wandering and skulking about in the Underdark’s wilds killing and stealing from passersby. However, Morn ended up running into the Zhentarim, who offered her safe passage to the surface world in exchange for her unmatched stealth and killing skills

She spent a few years with the Zhentarim and was based in Baldur’s Gate. Her talents in murder caught the attention of the Bhaal cultists who began to test her with several assassination attempts

After passing these tests, she was brought to the Murder Tribunal and discovered her lineage and thus began the canon Dark Urge past until being infected

Post-Parasite

She wakes up with no memory of the past and only possessing the armor on her back and the unrelenting desire to spill blood. Morn’s conscious is slightly clearer from the Urge since waking up on the nautiloid, she has an inkling of right and wrong - as opposed to her childhood were impulse control is at its lowest in anyone’s life. She yearns to kill but is allowed to have the feeling of not wanting to.

Upon meeting her companions, she heavily guards herself - not only because of the Dark Urge (which slowly gets stronger along their journey) but she has had very little socialization, ESPECIALLY with people who not only want to be near her because of her abilities but because they want to be friends… maybe some want to be more than friends?

- NOTES: cannot read well (could barely read before meeting Gortash but was learning while working with him), has no romantic experience (if you catch my drift) and doesn’t really understanding flirting and things along those lines

Tola

Half High Elf Bard, Nobility (30 y/o): joyful and sassy young lady, excellent people skills, just slightly naive, always sees the bright side of things and wants to cheer up everyone around her, just excited to be there and make friends

Pre-Parasite

Grew up as an only child with a rich and learned family but has little experience in the “real world” (dad = human, mom = elf)

Had lots of friends in Baldur’s Gate’s upper city, spent her days studying music, history, and sword work

Preformed often at theatres for the upper classes but longed for adventures like those that the famous bards she looked up to went on and witnessed

Post-Parasite

Undeniably terrified but wants to be a beacon of hope and happiness for her newly found friends

Sometimes at camp, in her tent alone, she cries silently - scared of the possible loss of her companions more than her own. She fell in love so quickly with all of them and swore to herself to do absolutely anything and everything to save them.

As previously mentioned, a little naive to the ways of the world. She can be clueless and clumsy on quests which she profusely apologizes for later. Tola is teamed up with several skilled warriors and adventures, if she doesn’t keep up she will slow them down and could perhaps risk finding a cure. Because of this ideal, she does everything she can think of to be helpful to the rest of the party whil trying to sharpen her skills.

Tola often dreams of love, which she’s never experienced. Yes, she was well loved by her family and friends but she wanted someone to kiss and hold and share life with. She’s a little obsessed with love songs and finds herself frequently playing them on her lyre (and other instruments she’s picked up along her journey) while daydreaming of romance.

- NOTES: very affectionate physically and verbally, loves love and looks for it everywhere, very book smart

El (Ordella)

Half Drow/Half (Mystery) Elf Rogue, Urchin (mid 50’s): cunning and sneaky, does not trust easily, sarcastic, mysterious aptitude for magic and entertaining, enjoys tricking people and making them look like an idiot with their own words, very street smart, “rules are meant to be broken” type - dark humor as a coping mechanism

Pre-Parasite

El grew up in Braeryn, arguably the worst (poorest and most-crowded) district in Menzoberranzan. Living amongst “undercreatures” (orcs and various goblinoids), she learned how to scheme, trick, steal, and sneak to get necessities (and maybe some extra things like toys or sweets).

Since she could remember, El lived alone on the streets with few acquaintances (creatures she’d never refer to as friends) with little charity. The locals knew almost nothing about her parents but told her that they had abandoned her. Rumor was that her mother and father were murdered by drow nobles from the upper parts on a “Hunt” - a common activity for the upper class in Menzoberranzan.

Many years later, she was picked off the slum streets to work for a noble family in the upper district because of the novelty of being a half-elf.

El was kept as a slave for several years with many horrors befalling her during her time. (will elaborate in a different post)

Merchants from the surface met with the family she worked for. Quickly, El came up with a plan to sneak away with said merchants.

Successfully escaping to the surface world, she settled in the black market world of Faerun. She traveled and did mercenary work for coin but never making a home for herself anywhere.

Post-Parasite

El made a business out of controlling her emotions, exhibiting a poker face, keeping calm. So that’s exactly what she did, didn’t show how scared she was in her current predicament.

She welcomed any and all companions she met along the way. The more pawns to move around if needed, as long as they didn’t get in her way. People were easy enough to get rid of.

However, she slowly found herself caring for these people. El was mildly angry with herself about this realization - now she felt extremely possessive and protective of her companions and was beginning to worry about their well being before her own.

- NOTES: experienced with manipulation, has never had a romantic relationship, frightened by intimacy

[prestotesting]

Know About Polariscope in Pet Industry: Testing-Instruments

A polariscope is a testing instrument that is used to detect defects and stresses in PET preforms, which are the raw materials for making PET bottles and containers. PET preforms are transparent plastic tubes that are heated and blown into various shapes and sizes. However, during the manufacturing process, PET preforms may develop internal strains or deformities that can affect the quality and performance of the final products. A polariscope works by using two polarized lenses and a light source to examine the PET preforms.

The polarized lenses filter the light and create a dark background. When a PET preform is placed between the lenses, any defect or stress in the material will refract the light and create a colorful pattern. By observing the pattern, the user can identify the type and location of the defect or stress in the PET preform. A polariscope can also measure the angle and intensity of the birefringence, which is the difference in the refractive index of the material along different directions.

If you are looking for a reliable and high-quality Polariscope Strain Viewer in India, you might want to check out the products from Presto Group, a leading manufacturer and supplier of laboratory testing instruments and equipment across India. You can find more information about the Polariscope and other products from Presto Group. You can contact Testing-Instruments for a quote or more information by visiting their website or calling them at +91–9210903903.

[bottletesting]

Know more about Presto digital profile projector and its working in different industries

The profile projector gives a much-enlarged image of the products which makes it very easy for the user to work on it. When the user is taking the measurements of an object, then he just has to place the scale on the image. When the user is checking the shape of the projector, it takes a reference chart with the screen and makes a comparison of the shape. The Presto digital profile projector is best for the users who have to wear glasses as it becomes very easy for them to view the enlarged image of the object on the screen. Another advantage of using a profile projector is that the same image can be viewed by several people at the same time. The for Presto’s profile projector working is an ideal instrument test that can be used in different industries such as PET and Preform industries for studying the shape of the irregular surfaces as well as their easy measurement. 

[scrumptiousharmonypuppy]

Preform Testing Instruments in United Arab Emirates

[ptc-stress]

Whether a Polariscope helps to observe common defects inside preforms ?

PET preforms have been the most important semi-products for food and beverage industry. After blowing , they will be processed into various bottles and containers. Many preform manufacturers claim that there are some obvious defects on their bottles. There is a easy-operating and low-cost method to avoid such quality problem.

It is to use a non-destructive testing instrument —-Preform Polariscope. A polariscope takes advantage of polarizing light . When inspecting a preform under polarized light, the stripes ( patterns ) caused by molecular orientational strain becomes visible. These patterns are an excellent indication of preform quality when considered along with other defects which are more clearly under polarized light. A well-made preform will display orderly stress patterns , while irregular stress patterns indicate a poorly made perform. So a preform polariscope is an practical testing instrument to pre-judge unqualified preforms. To ensure an even consistent material distribution throughout the bottle walls during blowing process , it is important to use a well-made perform.

Defects such as crystallization are usually invisible under natural light source, but they can be much clear when observing under polarized light.When placing a preform on a strain viewer, the angle at which the preform is placed relative to the polarization axis is very important . We usually choose to observe a preform when it is placed at 0°and 45°to the polarization axis . 1.When the preform is placed at 45° to the polarization axis, we will see two images ①Colored stripes in the sides of the preform. They are called isochromatic lines . ②A black line in the middle of the preform, which is called an isoblique line. It indicates the direction of stress.

2.When the preform is placed at 0°, only the isochromatic line can be observed. We will see a clear black pattern in the center of the preform .

For coloured performs such as amber, blue and etc , it will often be essential to use the yellow LED light.

https://www.ptc-stress.com/whether-a-polariscope-helps-to-observe-common-defects-inside-preforms/