I tried printing on back of some normal shirts today - not t-shirts - but when I applied heat press, the ink became textured as shown in image. Any advice please.
Rai,
No idea. What fabric is this on? Can you scan this in so that we can see the fabric? It almost looks as if the fabric may have reacted to the heat of the press.
Maybe the ink is damaged? But to be honest I love that texture, it's very interesting. Sure it's not what you intended to get but it sure looks different.
Alot of times certain shirts will have what is called a sizing treatment on them. This helps to keep them looking nicer longer in stores. My guess is that there is some kind of sizing treatment on that shirt. Did you buy it from a department store? If so that may be the problem.
__________________
Always do right; this will gratify some people and astonish the rest. ~~~Mark Twain BobbieLee
Hawrai,
Are you touching the fabric of the shirt directly with the heatpress?
If you are, I would put a teflon sheet between the heat press and the ink on the shirt.
From here it looks like something is ggetting stuck to the heatpress.
Maybe you could dry the ink first by hovering the press over the print first and then closing the press to cure it. We print on bandanas and haven't seen the ink do that on woven fabric.
Hover for a few seconds, then place paper/parchment on it and press medium pressure for 90 seconds at 330.350 and then see the results. Have you printed to anything else with this same black cartridge? If this is a new machine and that was your first print, are you sure that the shipping fluid is out of the lines?
As I asked above, did you buy this shirt at a department store? If so, no matter what you try heat pressing it might not work if there is a treatment on the fabric. If you are wanting to use 100% cotton button up shirts, I would buy them from a wholesaler to make sure no treatments are on the fabric.
__________________
Always do right; this will gratify some people and astonish the rest. ~~~Mark Twain BobbieLee
Another thing to try is to mist the shirt with distilled water and then heat press the shirt before you do anything with the pretreatment. Some people state that they are able to steam out the sizing chemical on some shirts. This does not work for all shirts though.
Definitely let us know if something works. On a side note, I do see where having some textured in the ink could look pretty cool for specific garments only if they hold up in the wash.
Strange texture - help 
