Warning on digital grey Goo - AVS Forum
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Old 07-25-2003, 09:55 AM - Thread Starter
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I just looked at my sample of digital grey goo Ken sent me (haven't looked at it for a few months) and found that the paint has seperated. The silvery/grey pigment has seperated from the base and has made a clearly visable blotchy surface. This would definately effect image quality!

I don't know why it has seperated and when it did, or if the vinyl backing it was placed on played a roll in this but it clearly looks like a calico cow now.
Maybe the tint isn't compatible with the base or it needs some sabelizer or something.

here's a pic of the material.

This sample was stored in safe conditions so no outside environmental effects were the cause. The whole sample is like this
LL
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Old 07-25-2003, 10:06 AM
REW
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Yes,
The attachment looked scary.
But on a hunch, I fired up my PJ on my Goo screen sample.
I went into service mode and typed in password (0901)
And everything was OK.:)

Ron
"Your priorities will be different-its the weighting that counts!-only if its done by FET!"

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Old 07-25-2003, 11:08 AM
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It would be great if Ken could respond to this problem. I just finished painting my blackout cloth with Digital Grey base coat and Digital Grey Lite top coat. I do NOT want this to show up as it looks amazing right now.

What is Ken willing to do for us (if anything) if this does happen?

Ken, your comments are always appreciated.

Thanks
Bob
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Old 07-25-2003, 01:49 PM
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yes..I told people that the samples were sent on VINYL..and this is what happens when you place Screen Goo on VINYL. The plasticizer outgasses from the vinyl, and creeps into the Screen Goo.. and un-curing it, in a strange way.

It can take over 6 months to happen, but it can be accelerated via heat.

It slowly turns into the backside of a giant 3M post-it pad. It gets sticky! and stays that way....... forever!

Vinyl is a no-no. It was sent out as sampls as it was ecenomical to use the roll of experimental vinyl sitting around, instead of finding another material.

It could be said it has the double purpose of showing people what happens when you place the product on vinyl.

The darker areas are, incidentally, the same color as the Screen Goo is as a liquid, before the water comes out. You can see the change in tone, in the photo.

Ken Hotte

"Never forget that only dead fish swim with the stream." -- Malcolm Muggeridge.
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Old 07-25-2003, 03:58 PM
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KBK,

don't you think it would be wisest to send at LEAST 2-3 month old samples to show people the 'optimum picture quality' for screen goo? Since it takes that long to cure?

If you do have samples of this age, i'd like one since I was unsatisfied with my Goo application...

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Old 07-25-2003, 04:20 PM
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Ken,

I used the ruberry side of the blackout cloth. Will this happen to me as well? I hope not.
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Old 07-25-2003, 05:11 PM
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It sounds like a warning that 'vinyl is a no-no' should be added to the Goo FAQ.
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Old 07-25-2003, 05:19 PM
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The Goo faq does, i believe have warning about the use of vinyl as being a no-no. The goo bible may not. But the one I send out in email inquires does.

A VERY freaky point of interest!

IF you DO use vinyl..the screen will have this problem..and then..it does something really, really strange. It will also take time to go completely dark.

The gain goes way up..and the screen is signifigantly darker. But the axial gain characteristic stays nearly the same. Blows my mind.

Best screen around, bar none. No freaking joke. but.....it's kinda sticky!

I had one just like it for my CRT projector, but with a CRT mix. Blew my mind, and I hated giving it up.

I stress, that this effect and problem happens ONLY with vinyl. Blackout cloth is fine.

We have no finished samples of any kind.

Ken Hotte

"Never forget that only dead fish swim with the stream." -- Malcolm Muggeridge.
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Old 07-26-2003, 05:05 AM
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IIRC, the tag on that "rubbery/fabricy" blackout at Fabricland says 70% cotton/30% polyester. No vinyl in there.
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Old 01-21-2004, 05:55 PM
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Does this happen with Parkland Plastic or similar materials (could have vinyl content) or are we just talking about vinyl like they made 60's car seats and knee high boots out of?
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Old 01-22-2004, 11:40 AM
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Yes. Painting your knee high boots with goo will make them sticky. The reasons behind or the situations surrounding these things..well...we don't want to know....

Parkland's will be fine, it does not have any real amounts of plasticizer in it.

Ken Hotte

"Never forget that only dead fish swim with the stream." -- Malcolm Muggeridge.
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Old 01-22-2004, 11:43 AM
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:)

Thanks Ken.
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