This simple device facilitates the use of any tube, helping to squeeze it evenly and gently. It consists of a base in a hole which is inserted the tube, and turning a key with slit for exciting a planar end of the tube. The base and key are made of wooden bars of appropriate dimensions. Their interaction is clear from the figure.
Recommend to read
THE TIP IS IN THE TUBE
As you know, carrying sharp objects without case - for example, ski poles, public transport is not permitted. Existing ferrules, no skier no use: they are plastic, from the cold lose...
DRILLS ENLARGER…
At the present time become unneeded enlargers: not only because of the high cost and scarcity of photographic materials, but also wide distribution of "phocomelic" and laboratories for...
