Yahoo Groups archive

Digital BW, The Print

Index last updated: 2026-04-28 22:56 UTC

Message

Re: [Digital BW] MIS VM from Piezo VP3, 4 Paul and Jerry

2001-09-03 by Paul Roark

Todd,

You wrote:

>...I wonder if we experience this more than Paul cause we are on Macs
>and he's on a PC. ...

We have run into a Mac-PC difference for the 1280.  I wonder if the 1160 is
also affected.  Could you send me some test strips for the curves on EAM?

>...the blacks with the MIS inks seem to start out warmer (redder?)
>than the Piezo, until the inks dry.

They should be the same.  I just did a raw scan of a Piezo test strip (Piezo
driver) and an MIS variable-tone test strip.  The 100% black PS Histogram
tool RGB readings are as follows:

Piezo black -- 10.3/7.8/5.8

MIS VM black -- 5.2/1.8/1.7

(The luminance difference is due to the lighter Piezo driver blacks, not the
inks.)

The red minus blue values (that is the "warmth") of the inks are relatively
close.  In my testing, the two inks seem so close that I think they probably
are the same ink.

Paul Roark
1424 Aarhus Dr.
Solvang, CA 93463

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.