Get a infrared thermometer. Standard plastisol cures at 320 so you will Need a surface temp around 345 give or take. The main thing is not to try and cure close as the surface temp will get there quickly while the underside of the ink won't hit temp. 3-4 inch above shirt 20-35 sec. It can be easy to scorch shirts. Also don't cure on your platens. You will warp them very quickly if you do. If your use to water base inks you will quickly notice plastisol is thicker. Mix you inks well and get some curable reducer. You will also find with white you will need to print flash print and when doing this you want to gel ink 10-15 sec so that it's dry to touch then print 2nd hit. Watch a few YouTube videos.