3D Printing: Large flat ABS print curling during cooldown The Question: I am printing a large flat print, approximately 8" x 4" x 1/8". It has good adhesion when printing and lays flat when finished. I allow the print to cool slowly but the center of the print bows upward 1/16"-1/8". It bows in both directions but more noticeably in the longer direction. The corners are not curling up this is the center of the print lifting. I started printing at 25% infill but have tried 100%. 100% bows less but still bows. This does not happen with PLA or PETG. 100% fill was printed with no fan. 25% printed with no fan for first layers and fan at 40% after. Is there anything I can do to stop this from happening? Printer: Lulzbot TAZ 5 w/ 0.5mm hotend in sealed enclosure. Heated bed at 115C, extruer at 240C. Environmental temperatures are 30-37C depending on the stage of the print. Hotter as it continues. Follow Up Questions: What is the ideal environmental printing temperature for ABS? If a part were reheated could an existing arch be corrected? Update: Build Plate Thermal Images w/plate set @ 115C [Center_Plate] [Front_Corner] Solutions: Please watch the whole video to see all solutions, in order of how many people found them helpful With thanks & praise to God, and with thanks to the many people who have made this project possible! | Content (except music & images) licensed under cc by-sa 3.0 | Music: www.bensound.com/royalty-free-music | Images: stocksnap.io/license & others | With thanks to user tbm0115 (askubuntu.com/users/98), user jmb2341 (askubuntu.com/users/4703), and the Stack Exchange Network (3dprinting.stackexchange.com/questions/2988). Trademarks are property of their respective owners. Disclaimer: All information is provided "AS IS" without warranty of any kind. You are responsible for your own actions. Please contact me if anything is amiss at Roel D.OT VandePaar A.T gmail.com.