Condenser or Diffusion Enlarger


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The 'extremely thin' cut sections use extremely small sharp glass 'knives' from 'amorphous' glass 'lumps that are exuded from volcano 'eruptions'. I have a 'lump' of such material that I was given at a workshop many years agi.
I'll provide a digital image of it sometime to-morrow when I have 'completed' all my 'daily 'orders' from "She Who Must be Obeyed'
If my memory is 'good enough' that volcanic 'glass' is known as amorphic glass. If my memory serves me well it may also be used by 'eye' surgeons due to its extremely small 'clean' sharp cutting edge (MUCH sharper than the sharpest of metal 'blades')