For fixing the film during drying, usually use special clothespins or clips. But if these instruments are at hand does not, they will replace ordinary paper clip.
Recommend to read
SAFE POWER SUPPLY
The inclusion of transformers on 400 Hz network, 220 V(50 Hz) using a ballast capacitor. If you look at the merits in diversity of industrial and self-made Amateur radio power supplies,...
“SWALLOW’S TAIL” AND OTHERS
Connection of wooden panels with various kinds of spikes with the twofold goal. First of all, getting hard articulation of the various parts of the structure, such as parts, shelves,...
