Help with glass coasters

[tanzap]

Hi

I have purchased some glass coasters from bms and struggling to get a decent print.
I am currently pressing at 190 degrees for 150 seconds but the middle of the coaster is slighlty cloudy and generally the colours are all a bit dull. (I also tried 120 seconds at 200 degrees)

Do you have any idea on how I get print these better, I also tried printing them on my 'back-up press' but had the same issue

Thanks

[webtrekker]

Do you do any other sublimated items, and do they turn out ok? This may be a silly question, but are you sure your press is set to Celsius and not Fahrenheit?

[tanzap]

Everything else I have printed works fine, t-shirts, metals, hardboard coasters and jigsaws.
I have even tried turning the coasters half way round to see if that helps

[UK Printed Mugs]

We do glass coasters at 190c 210s and of course paper face up with glass coaster on top.

[phoeniximages]

sounds like the coaster isn't completely flat if the middle is getting cloudy - i'd get a 1.5mm-2mm thick silicone mat to help - works much better than a teflon sheet. just need to add 45-60seconds to the heating time.

peter

[Justin]

Glass is notoriously tricky to print, I gave up on the small items I was doing as I simply wasn't happy with the quality. If I remember correctly, I used a silicone pad and preheated the panels first, similar to slate/acrylic.

I'd check with your supplier though.

[GoonerGary]

I print glass coasters one at a time because I often get failures.

Heat press up to 200 degrees C and print for 4 minutes.

Teflon baking sheet to protect platen
plain paper
glass coaster (printing side up)
plain paper
thin blue silicone sheet
teflon baking sheet.