https://www.soliforum.com/topic/18668/question-about-pla-and-temperature/ Thu, 25 Jun 2020 12:19:48 +0000 PunBB https://www.soliforum.com/post/153631/#p153631 Glass transition Temps are well over 100. That's when the material begins to melt. So you should be fine even in a sealed enclosure. But you should vent just to be safe and extend the life of the bulb. Honestly I would use 4 watt night light bulbs. Just as cool but much lower cost.

]]> Thu, 25 Jun 2020 12:19:48 +0000 https://www.soliforum.com/post/153631/#p153631 https://www.soliforum.com/post/153627/#p153627 Thanks Tin.
I didn't have a lithophane box at the time so I used a Qt Jar ( Plastic) to cover it and let it heat up for an hour before I took the readings so it was sealed.(no air flow) I figured the bulb would be the hottest area so i secured the TC to the bulb.

]]> Wed, 24 Jun 2020 21:30:43 +0000 https://www.soliforum.com/post/153627/#p153627 https://www.soliforum.com/post/153626/#p153626 how far is the lithopane from the bulb ? does the design allow for air flow ?   
A more realistic test is to  mount the box and place the temperature sensor on the lithopane. I expect the temp to be fine. unless the box is fully enclosed and very close to the bulb.

]]> Wed, 24 Jun 2020 21:00:41 +0000 https://www.soliforum.com/post/153626/#p153626 https://www.soliforum.com/post/153596/#p153596 HAPPY FATHERS DAY!
I have been printing Lithophane boxes and the lithophanes are PLA. I use the bulb shown belowD run a test to see how hot the LED bulbs get putting the probe against the bulb and here is the results.
notice I had the TC up against the bulb.
is it to hot for PLA.
Thanks
dale

]]> Sun, 21 Jun 2020 17:20:59 +0000 https://www.soliforum.com/post/153596/#p153596