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Adhesive turns milky! help
Hi all,
Just done a job. Printed on clear and back with white.
applied wet with baby Shampoo & water.The adhesive is starting to turn milky!
Will it ever turn clear again? if so how long will it take? is it worth the wait and having an unsighly job doing bad publicity?Thanks
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13 Replies
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was there a big difference between outside and inside temperature…?
was there a heater near the window wich can cause damp onto glass surface?
was the vinyl suitable for wet apply?I’ve had the same problem with transparant blue that I have applied in december last year. Very cold outside and warm inside, the hot air ‘felt’ on the application fluid turning it blue-white…
Had to redo the job 3 months later, milky effect did not go away 🙁
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Some adhesives do go milky when applied wet.
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Hi Clive
Looks like you have bought a film with a water based adhesive (contact with water will cause the milkiness) – Most monomeric films will have a water based adhesive system whereas most polymeric and cast films use solvent based adhesive systems.
Check with your supplier what adhesive your film has but your choices will be switch to a solvent based adhesive system and apply wet or stick with what you have and apply dry (which for a reverse window application will be tricky and may create too many air bubbles or silvering)
Will it go away ? …. It may reduce as it dries out but dark printed areas will probably always shows some discolouration
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Thanks for your replies. I have decided to remove it, it looks too bad to even wait and see if it clears.
just out of curiosity, am I right in saying that most etched vinyl films don’t go milky?
I am using a new product LG HI-CAL and worried it might do the same.
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LG Hi-cal is a solvent film according to the net, should be fine
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change shampoo
we apply with water only
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I’d like to be able to apply without shampoo – but that little slip is so helpful…
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you could use some official stuff
http://www.allprint.co.uk/ancillary-pro … aphics.htm -
I have my doubts if the official suff will reduce any of the milky appeareance. I rekon, if it’s going to react with the adhesive, it will do so no matter what application fluid you use.
Apart from smelling nicer, is there REALLY an advantage?I’ve tried Action tac. Whilst it works fine, so does baby shamppo and water.
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Out of interest how much is Rapitak. I’ve always used water and not had any problems with general signwork but something better would be good for windows. Is Rapitak that much better for windows.
Alan D -
We fit loads of reverse printed windows then backed in White, solvent based and just water, I never put anything in for any wet applications I just make sure it’s soaked both the window and the vinyl.
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I do lots of window based vinyl & etch work using water & baby shampoo. The same mix I use for window films. The small amount of slip does help in positioning and with solvent based adhesives do not get the milkyness.
So if you make sure it is solvent based adhesive should be OK. -
I would try the rapid tac (RT2 is "quicker"/less soapy feeling)
It can’t hurt.
I used to use home-brew solution but found rapid tac to be far superior.
Love….Jill
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