Forum > Problem Solving > Excess Pva After Dip

Drewjak Posted 12-May-2013 19:22
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12-May-2013

2
Hi all,  I`ve just purchased a kit of activator and carbon sheet from the HGW ebay shop,

I`m new to dipping and have only done a couple of small things so far.

Im just looking for pointers at the moment as i know i must be doing something wrong,

I have my water at 35c
Sheet is shiney/sticky side down 
I leave sheet on the surface  for 60 seconds  before activating
Then ive dipped  more or less straight away ?

But when i take the item out there seems to be loads of pva left on the item which seems to be a struggle to remove
 and leaves the item as slimey as hell and a struggle to rinse off.

Is this normal or am i not doing something wrong ?

Any pointers appreciated

cheers Andy



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ChrisB Posted 13-May-2013 12:16
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31-Jan-2013

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hi andy, your water temp is too high. it should be between 28 and 32 celcius. i keep mine at 30. normally the film should be shiny side up but not always. wet your fingers and touch the film, wichever side it sticks to should be facing down in the water, yes the pva coating after you dip is normal, you just have to keep rinsing till its all gone, chris b

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Drewjak Posted 14-May-2013 19:49
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12-May-2013

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 I did check to make sure i had the sticky side down, i will lower my water temp and see if it makes any difference.

The build up of pva just wasnt what i was expecting to be honest but if its quite normal then thats ok.

Thanks for the pointers

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Hydro-H Posted 14-May-2013 22:16
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13-Nov-2012

90
60 seconds is a general guide but there are so many different PVA's that it does vary.
Don't be afraid to try longer soak times if needed. It is not so unusual to leave some of the thicker PVA patterns for a minute and a half or I've spoken to customers who have soaked for longer.

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