Кривой винил

На 49. Согласен. Вакно, как говорил Паша с Ленинского:)

На 50. Для тех, которые запечатывали, это объясняется тем, что пластинку, не дав ей остыть, закатывали в полиэтилен, и запечатывали с некоторым натягом. Если присмотрется, иногда виден загнувшийся уголок под натяжением плёнки конверта такой пластинки. В этом случае, когда пластинка уже остывала внутри и могла принять деформированную форму. Нарушение технологии производства, когда неаккуратный работник стремился побыстрей всё сделать и не давал пластинке времени остыть.    

На 51. Не факт. Бывает и при неправильном хранении. Но лично неоднократно распечатывал винил, оказывавшийся кривым, только американский.  

Вот какие методы исправления винила предлагают англоязычные товарищи:

1) Положить надолго под кипу книг или пластинок (с использованием стекол или без него)


а) Heres what you do and it really works:
1. Get two peices of 1/2" glass approximately 12" x 12" in width and length. It be round, square or any shape as long as the vinyl fits.
2. Place the first glass on a flat surface. Put the vinyl then place the 2nd glass on top of the vinyl. In other words, sandwich the warped vinyl in between two glasses.
3. Place 20-25 vinyls on top of the sandwich and leave for about a week.
Your vinyl should be flattened after that procedure. Try it.

б) Seriously though, I bought an LP of Ebay once that had a bad warp (seller refunded though). The warp was so bad that when playing the first 3 tracks the arm would leave the vinyl and jump in the air. So I put it under a pile of a couple of hundred records for a few months (not intentionally, just through laziness). Then one day I got it out (oooer) to show somebody the comedy jump, and although it was slightly warped it never did jump and played perfectly.


2) Между 2-х кусков стекла положить на большой радиатор:


Theres a record shop in Antwerp (no, not that  one) which has two large slabs of glass perched precariously on top of a large radiator. The geezer who works there claims it sorts warped records out a treat.

3) Между 2-х кусков стекла в сауну при t=75 градусов + один день на остывание под давлением


а) Ive experimented unwarping with shitty records. Low heat oven is no good. Best results Ive gained with those two legendary pieces of glass and sauna in 75 celcius and then one day cooling period under pressure... Ive gained couple of straight vinyl by that, but also some bad ones... Maybe not good after all put much safer than the oven trick. The problem seams to be finding a solution which is 100% risk free before doing anything to some precious piece of vinyl.

4) Между 2-х кусков стекла на солнце  + остывание под давлением


а) I know one elder dealer who says he has unwarped multiple records over years... His system is leaving record between two pieces of glass in sunny spot, and then letting it cool down under pressure for long time. Same guy fixes ticks from records with wooden spike...

б) just put the record in between two pieces of glass and clamp the whole thing down on each end.
Then i leave it out in the sun for a few hours, and its usually fine.

в) You can try to salvage a warped vinyl record but do this only at your own risk- sometimes it only makes it worse. Place the record between two pieces of clear glass and place outside in the sunlight. I have had this both work and be a complete failure.


5) В духовке


а) A hot car speeds up the process quite a bit (using the 2 panes of glass method of course). If youve got a big enough oven, you can do it in there as well. I normally do it around 40-50 degrees (fan forced) until the glass is "reasonably hot" (quotes because its not an exact science). If youre not sure, less time is always better - you cant undo heat warping along the edge, and you can always try again if you dont get the desired results.
Run a shallow bath and submerge the entire assembly (glass, clips, record) after its been heated to ensure uniform cooling.

б) Turn your oven on warm and but the record in on a flat hard surface. Then put something flat on top of it with 3 to 5 pounds of weight distributed evenly. After being in the oven for 10 minutes at 150 degrees. Turn off the oven and let it slowly cool over several hours. Your record will be fixed.

Также имеется статья, в которую собраны подобные способы:
http://members.aol.com/clctrmania/cm-unwarp.html

СУПЕР!!!!!

Да... Осталось только уточнить, а что собственно имеется в виду под исправлением.
Беда в том, что большинсво пластинок, которые мы величаем КРИВЫМ ВИНИЛОМ, нуждаются не просто в выпрямлении, которое иногда полуцайца, а в переформировании, т.е. в ПЕРЕПРЕССОВКЕ.