My process for making tintype effect on Instax film with iPhone apps and Fujifilm SQ10 Instax Square camera. The Tintype iPhone app converts regular iPhone photos to tintype images in either a square or rectangular format. There are various settings in the app for black and white, sepia, or color, with or without frame, eyes in portraits, depth of field and grain effect. The other app that can be used is the Hipstamatic app that uses a combination of the Tinto 1884 lens and D-Type film, but only saves in the square format. After the photos are saved to the iPhone camera roll, I transfer them to the micro-sd card for the SQ10 Instax Square camera using a lightning port micro-sd card reader. The photos can then be printed from the SQ10 Instax Square camera. I have sometimes used the sepia filter to get a warmer print. These could probably also be printed on a SP-3 Mobile Instax Printer, but I don’t own one of those to try it out.
I’ve also printed the tintype effect photos on the Kiipix Instax Mini printer using the rectangular shaped photos from the Tintype app. This works really well for antique cars, old machinery, or anything that would look good with a vintage photo treatment.