High density covering red pens for the masking of photographic films.
The deep red ink completely absorbs the wavelengths included in the spectrum sensitivity of the printing shapes, therefore covering completely.
The Mask Opake pens are marketed with the three usual tips: ultra-fine, fine and medium.
The pens with fine and medium tips are with cartridge barrel. Ultra-fine pens have the usual blotter.
All of them are in aluminium to prevent the ink from evaporating.
Single box of 10 pieces