Wratten gelatine-Colour filters Wratten Colour Filters are manufactured by using organic dyes in a gelatine material to achieve the desired colour effects, which is not possible in colour glass, especially band-pass types. Thinner substrates can also be achieved and at 0.1mm thick may be useful where space is limited. The well-known `Wratten’ gelatine filters are the wider range and are more accurately controlled and documented. The Polyester Filters are much more robust and less expensive.
Knight Optical > Filters > Colour filters - Wratten Gelatin > Long-pass filters Only UK and EU customers are charged VAT at 17.5%, customers outside the EU and EU customers based outside the UK who have a valid EU VAT number will not be charged VAT Bulk Discounts! Where (B) appears next to a price below, bulk prices are available, click the (B) button to view! PDF Part No. Wratten No. Size/dimensions (mm) Thickness (mm) Wavelength (nm) Price Qty Buy 411FWP7575 2B 75 x 75 0.1 411 } Pale yellow (UV-absorbing) £26.70 430FWP7575 2E 75 x 75 0.1 430 } Pale yellow (UV-absorbing) £26.70 494FWP7575 8 75 x 75 0.1 494 } Yellow £26.70 519FWP7575 12 75 x 75 0.1 519 } Deep yellow (minus blue) £26.70 528FWP7575 15 75 x 75 0.1 528 } Deep yellow £26.70 540FWP7575 16 75 x 75 0.1 540 } Yellow-orange £26.70 568FWP7575 22 75 x 75 0.1 568 } Deep orange £26.70 600FWP7575 25 75 x 75 0.1 600 } Tricolour red £26.70 622FWP7575 29 75 x 75 0.1 622 } Narrow-cut tricolour red £26.70 717FWP7575 89B 75 x 75 0.1 717 } Black filters absorb vis, trans IR up to 2500nm £58.60 794FWP7575 87 75 x 75 0.1 794 } Black filters absorb vis, trans IR up to 2500nm £58.60 852FWP7575 87C 75 x 75 0.1 852 } Black filters absorb vis, trans IR up to 2500nm £58.60 Knight Optical > Filters > Colour filters - Wratten Gelatin > Long-pass filters
Specification   Dimensions: 75 x 75 x 0.1mm
Specific requirements We can cut Wratten Filters to any size at short notice, so if your requirements are not listed please contact us by telephone / fax or email: stockrequirement@knightoptical.co.uk Options available   · Cutting down to special shapes and sizes Technical Data Sheets Are available for each filter on request See also Polyester-colour filters Acrylic filters