On Behalf Of Julian Thomas > > Now I don't use cis units. > Hi Julian,
With respect to your note about printing different densities from different CIS, I would point out that I believe your experience with multiple CIS use was with a pigment based ink in a solvent carrier, and only two ink types (that I am aware of) with these characteristics have shown this clogging problem in the CIS tubing - and only for a very small percentage of users. It is true that some of the tubing used in CIS is porous to some extent, however, the alternatives with non-porous internal coatings are not suitable for use in applications where the tubes are subject to movement (coating can sheer off the inside and create clogs, or are too stiff to be moved reliably by a small print head). In other words, CIS design is like many things, a case of selecting the optimal products for the job. In addition, the code numbers you see on various tubings may only reflect the broad range and not the detailed implementation - I know of at least one tube type used in a variety of markets (including medicine, lab work, and I don't doubt others too) with the same tag but different properties. As a contrasting perspective, we have heard from users who noted; Print densities differing from 'full' to 'nearly empty' OEM ink cartridges, Prefilled ink carts from the same batch printing with different colours, And of course, we know that for the most part, two different printers of the same model can often print differently... and so on. So although your personal experiences do suggest possible problems with the use of a CIS (certainly with that ink)... I would suggest that there can / may be consistency problems in every element of inkjet printer design??? Just some thoughts, Nij =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
