Inkjet Printable Vinyl

[TanCoed]

I have in stock Inkjet Printable Vinyl from a large Chinese manufacturer. This media was printed on my Epson ET 7750 which had the original 4 dyes and one black pigment inks.
The print was water tested under a running tap and soaked in a bowl of water for a few days. The results were perfect. Many months later the ink was replaced with a spare set of bottles supplied with the original purchase of the printer. i.e. The same reference inks with 4 dyes and one black pigment ink. The result was a total water test failure. The vinyl manufacturer has no idea why this happened, does anyone have any ideas?

 

[Ink stained Fingers]

Many months later

What happened since then - you state that you replaced the inks from a spare set of bottles - supposedly the same OEM inks as they came with the printer.

But what happened with the paper - are you still printing from the same roll or out of the same box ? The main stabilizer for the the durability under water is the coating on the paper - that it does not dissolve again after it got into contact with the ink solvent - it dries up with the colorant and should not dissolve again, so I think it's something with the paper - e.g. a different type - the same type but with some hidden changes to the coating since you used it earlier.

 

[TanCoed]

Your explanation seems to be the only logical reason. However, this stock is the same manufactured batch as the original.

 

[Ink stained Fingers]

I don't have another explanation than a running change of some material in production - the resin of the coating; you may try other vinyl papers if they show the same effect or are waterstable as you need it.

 

[TanCoed]

Thank you, as always, for your kind attention.