...Same amount of time as that brand ink will last when properly cured, in this case. Remember we are not really curing at a higher temp just measuring the ink in the hottest place. You know when you check the temperature of cooked meat, you do not check the skin you check inside...
Hello mark. Yes, the cooked neat is a nice anology. A probe type of thermometer is usually inserted into the meat if one wants to check if the meat is cooked inside. Unfortunately, we cannot probe the ink.
So your target of 340F lowest ink temp, or an extra 20-40F over the often heard 300-320F, is an insurance?
On the matter of ink colors. You seem to have the same temp and belt speed settings for both white and black inks.
I have a separate thread about plastisols cracking in just a dozen washes or maybe a little more
(Those are not my prints though but below is one of the pictures).
I also have halftone prints where some of the dots have gone missing after a couple of dozen washes(these are my prints). Some suppliers told me that all plastisols will crack and it is just a matter of time. But, I have also read that properly cured plastisols should not crack and should outlast the garment.
Someone posted that cracking after 100 washes is good enough and he has shirts that still haven't crack after 15 years. These are certainly more reassuring data.
Maybe you can give a more "industry-wide" answer, based on actual experiences or feedback from the many users of your dryers or maybe also on your tests. How long should a properly cured plastisol (like in your video) be expected to last before cracking? Or what is a good benchmark in terms of number of washes?