I use plastisol ink and don't have a flash dryer but I do have a heat press. I hover it over the image for a little over a minute then press it at 350 degrees a few times for 15 seconds and it is cured. I even tried the wash test and it is still perfect.
Somewhere around there. Hot enough to evaporate the water in the ink. You should be able to feel a difference before and after as far as the thickness of the print. The print will feel flatter and more into the shirt after the iron. The iron has to be at medium to high pressure against the shirt.
When I started out I used waterbased inks with a cold cure catalyst. Add 5% of the catalyst to the ink for the job, print the tees & hang them to dry overnight. No need to heat cure. Worked very well for me & those tees are still great 2 years later.
Ask your ink supplier about this option. A much better option than manually drying every tee with an iron or heat gun. Ive done both & its something Im glad Il never have to do again
You could buy 2 quartz heaters with some mods, use them to make a very cheap light weight flash unit. A stand and, aluminium angle for a box frame to hold the quartz heaters into one big flash unit. You would need to bypass the tip auto kill switch. The flash would have a total of 6 quartz bulbs and two plugs so you could turn on the lower bulbs for larger surface area. A new flasher would cost more than what you would pay for the finished product, and could cover a 14 by 18 surface area. That would be a macguyver task though.
I typically use water based, but i need to do white on black. The quartz idea is ingenious but way too much of a project. Ill make do with the heat gun and iron (if it works) and just op for a heat press asap, start doing ink transfers...
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