Hacker News Reader

The problem is the assumption that people will consistently manage to ensure it only reaches 75 degrees.

I don't think my oven can go lower than 200F.

If your oven is not accurate near 75 C. maybe you can use one of the other methods, from the pdf it looks like water steam could do the same job.

Food dehydrator.

People can use a water bath like one of those sous vide machines. You seal the mask in a ziploc bag and weight it down below the surface. That should be a pretty consistent temperature of 75C.

If you have a thermometer you can turn the oven off manually as it approaches your target temperature. I do this for warming bread dough. Once you know how long it takes you don't need the thermometer.

Ironing clothes is 100-250 °C.

Should we just be ironing masks?