CMY colour gobo's: 

These gobo's consist of borosilicate glass 0.5-0.6mm with a dichroic coating of Cyan, Magenta or Yellow and photoresist. 

The material is available in three versions:
1)  No photoresist
2) The photoresist is deposited immediately upon the dichroic coating,
     and can be patterned at good resolution, approx 20µm.
3) The photoresist is deposited on an intermediate chrome layer,
    which allows patterning at high resolution, down to 10µm

The dichroic coating itself is etchable to high resolution and has excellent temperature stability. The colour drift is limited to +12nm @620nm for magenta at 300°C. 

Three etched CMY color gobo's can be assembled on a forward or reverse black gobo to form a high resolution CMYK system. This can be done by either glueing the CMY gobo’s on a larger K-gobo, or by glueing the CMY gobo’s on a same-size K-part and then put the whole assembly into a ring.

These CMY gobo's can either be assembled on a forward black gobo (dichroic to the lens) or on a reverse black gobo (dichroic to the lamp) 

Advantages :
-  Ideal to build full colour gobo's by CMYK mixing.
-  Cyan, Magenta and Yellow are matched and have less than 2%
   transmission when cascaded.
-  Low pinhole count.
-  Low stress dichroic film - compatible with hot and demanding lighting equipment.
-  Glass thickness is low enough to cut down reflections and allow good
    focussing capabilities.
-  Best tradeoff between etchability and temperature stability : approx 12nm cutoff
    wavelength shift @ 300°C for magenta at 620nm, meaning a near invisible colour shift
    on the hottest projectors.
-  Patternable to high resolution with high consistency.
-  Will not degrade over time.
-  Most standard sizes available from stock.
-  Competitive pricing.
-  Available in multiple sizes to accommodate various B/W gobo diameters.
-  Suitable mounting rings available.

CMY gobo’s are offered in these standard sizes: 21mm, 25mm, 34mm, 40mm, 48mm, 64mm, 80mm.

Eg : 34mm CMY gobo’s can be glued onto a 37.5mm K-part, or 34mm CMY gobo’s can be combined with a 34mm K-part and then mounted together in a 34mm->37.5mm ring.

Check out our ring sizes