If there is no suitable photo frame it can be replaced by any opaque tape, stretched on the table of a photographic enlarger in the longitudinal and transverse directions. The ends of tape segments need to pull the rubber band.
And DEBATIN, Engels
Recommend to read
- THE USE FOR ONE
"Headphone for stereo? This is too much, can mind reader. — How can provide high quality playback of regular head phones? After all, this requires a wide range of frequencies, a slight...
- UNSCREWS… BOILING WATER
Intractable loosening the tubular connection experienced craftsmen heated with a blowtorch. Almost the same effect can be achieved and more domestic. Spraying the connection with boiling...