I've OVER flashed some Quick White used as an underbase...

[Itsa Little CrOoked]

My inexperience with my auto has bitten me in the behind. I have apparently over flashed some Wilflex Quick White used as a full spot color base plate under some Triflex fluoros.

I machine washed a sample and the top colors failed. I assume, I've over flashed a few pcs. I ran another random sample through the wash and it was perfect.

Is there a "fix" for this batch of shirts?  Maybe run them through a heat press for a few seconds?

I don't want to eat this job if there is a solution.

Thanks!
Stan

(If it matters, my flash shuttles in and out on head 3. I believe it is an Omni flash with a 240 volt panel. After a round or two, and the shirts seem gelled, I turn the temp down from about 8 to about 7 and the flash setting gets lowered from 6 to 4 or 5. It is a 93 Gauntlet Revolver. GT-8)

[blue moon]

it is more likely that you did not cure the top layer enough. I would run everything through the dryer again . . .

pierre

[diavale]

i would second the undercure on the top colors

[Itsa Little CrOoked]

Really...


That'd be an easy enough fix. And what could it hurt?

I wish I had the donut temp probe. I have an electric dryer, a Brown (Harco) with a 36 inch wide belt and 6' heat chamber. It is EASY to overload, especially on a Waterbased Discharge job.  If the print area isn't too big, I can double up loading side by side on the belt, but it requires folding the fabric in half. In my mind, FOUR layers of cotton won't fully cure as fast as TWO layers.

I'm breaking all the rules doing Waterbased Discharge with my tiny electric dryer, but I'm stuck for now.

I've just hijacked my own thread. 

Would heat pressing these questionable plastisol prints do as well as another trip down the tunnel?

[DannyGruninger]

Really...


That'd be an easy enough fix. And what could it hurt?

I wish I had the donut temp probe. I have an electric dryer, a Brown (Harco) with a 36 inch wide belt and 6' heat chamber. It is EASY to overload, especially on a Waterbased Discharge job.  If the print area isn't too big, I can double up loading side by side on the belt, but it requires folding the fabric in half. In my mind, FOUR layers of cotton won't fully cure as fast as TWO layers.

I'm breaking all the rules doing Waterbased Discharge with my tiny electric dryer, but I'm stuck for now.

I've just hijacked my own thread. 

Would heat pressing these questionable plastisol prints do as well as another trip down the tunnel?

Back in our electric dryer days we had some similar issues. It was always undercured through the tunnel. Going back through the tunnel followed by a quick seal on the heat press always bandaided the problem for us

[Rob Coleman]

If the overprint colors are coming off the underbase after wash - and the underbase is still good and adhere to shirt - then you definitely have overflashed the white.  Classic case of intercoat adhesion failure.  Seen it hundreds of times.

Normal flash GELS the underbase, then when curing the overprint colors and the underbase become homogenous.  When you overflash big time, the underbase film becomes a solid sheet of vinyl and over print colors will not fully adhere. 

You can try to transfer -- this will remelt the entire film possibly fixing your ailment!  Test one!

[Itsa Little CrOoked]

If the overprint colors are coming off the underbase after wash - and the underbase is still good and adhere to shirt - then you definitely have overflashed the white.  Classic case of intercoat adhesion failure.  Seen it hundreds of times.

Normal flash GELS the underbase, then when curing the overprint colors and the underbase become homogenous.  When you overflash big time, the underbase film becomes a solid sheet of vinyl and over print colors will not fully adhere. 

You can try to transfer -- this will remelt the entire film possibly fixing your ailment!  Test one!

This was what I was thinking too. I actually already brought out a sample and did just that this morning.

The left chest is 3 spot color fluoro over a solid PFP Quick White base plate. The back art is much larger but very similar. The inks and colors ARE the same in both locations. I heat pressed the front art for 15 seconds @ 335 degrees and medium pressure (60 PSI) but not the back art. Then into the washer at the shop.

BOTH sides happened to survive the wash on this particular specimen. So my test wasn't particularly helpful.  And the custy is coming Monday to pick up his shirts.

I'm tempted run them all through the tunnel again and be done with it.

Rob, do you think I should heat press them ALSO?