Rgb part wont matter unless you are editing in CmYK which no one does anymore. The rip will do the conversion. Since the rip is probably 8 or 9 colors not just cmyk anymore unless really going to offset press. Unisys owned LZW and compuserve owned gif. UNISYS said it wanted fees. Voila PNG. Which supports indexed color down to 2 or 4 colors and all the way to 65xxx colors per channer.
On Jun 22, 2015 4:54 PM, "Herschel Mair" <herschphoto@xxxxxxxxx> wrote:
PNG was designed as an open source replacement for GIF which is patented and belongs to somebody (I think it's compuserve... too lazy to google it)It uses lossless compression.(I think it's LZW or very similar) and should give you an image without the square artifacts associated with Jpegs) It also supports transparency which made it very popular with web designers. However it was designed for the web and RGB color platforms and does not support CMYK. so it is not recommended for printing where it must eventually translate into CMYK.Does that help... You should check the facts... they're off the top of my head. (I've made decent prints from PNGs btw).HerschelOn Mon, Jun 22, 2015 at 12:03 PM Lea Murphy <lea@xxxxxxxxxxxxx> wrote:What are the pro/cons of supplying PNG files to a lab for portrait prints?My understanding is that PNG is for web use, not prints? Yes, no?Trying to clarify a clients’ request.Thanks so much,
