A flat surface cooler like this might be nice for pouring carbon tissue in warm climates. Turn on the juice after one pours the pigmented gelatin, quickly cool down the pouring surface (nowhere near freezing is needed...40 to 50F) so that the gelatin sets, turn off the juice, and lift off the tissue.

One might be able to rig the surface to be cooled or warmed (80 to 90F) as needed. Warm for the pour, cool to set. Pour tissues year-round no matter what the room temp is!

However, my low-tech way works in my mild climate: opening and/or closing the window until the room is the right temp.