It's content is mostly about April's Queen's Birthday stamps, the last of which may still be dribbling into your postbox soon. I know somebody who received the last set on his standing order on Saturday last. The only item of real news, now, comes from Head of Production Martyn Fry, concerning the digitally printed Post and Go stamps.
Martyn writes that the paper is the same for both gravure-printed and digitally-printed stamps, but to allow the digital ink to adhere successfully a Digiprime* coating has to be applied first. The phosphor is added by gravure, but will eventually be digital.
As digital inks are glossier than gravure, this is dulled by the phosphor (which is all-over on the picture) on Royal Mail stamps, and by a matt varnish on the Gibraltar Year of the Monkey stamps.
* This appears to be made by MichelMan a US company with branches in other continents. There are several variants of Digiprime, some of them clear, some opaque white, and some with a colour tint. Most appear to be created for use with HP Indigo Solutions inks. DigiPrime 2500 is listed as:
When added to size press treatments or pigment coatings this primer will optimize substrates for HP Indigo printability. It is slower drying and provides excellent adhesion of HP Indigo Electroinks® to paper.
Primer for digital printing suitable for paper substrates