I have one of those 1 step calibration packs and was wondering if it would still work if I took the humidipak out of the bag it came in and put into a larger zip lock bag so I could calibrate 4 hygros at once?
Be sure it is a freezer bag, the regular ziplocks are not really airtight. also aloow for a longer stabalization time as the humi pack will have to work harder/longer in a larger area