https://groups.yahoo.com/neo/groups/QuadtoneRIP/conversations/messages/12609
If so, and if for alt process use, you might be well served to follow exactly what he did. It's set out in the post.
Paul
PaulRoark.com -- Paul Roark's Photographic Home
Message
Re: P600 and all black inkset
2016-11-02 by roark.paul@...