Interesting read on the Kipenjungle site...if you continue to read there, it states that to get the true lacing described in the SOP, you need Ml,Pg, and Co, .... :
Complex patterns:
Meant are black patterns on individual groundcolored feathers, not the dark/melanized versions of wildtype up to black. Examples are lacing (concentric pencilling, double and single lacing), spangling (not mottling) and transverse pencilling (autosomal barring).
Sexlinked barring or cuckoo is in the next paragraph ... . Black pigment is shifted and sometimes enhanced for these effects. An important melanizer to do just that, and thereby influencing patterns, is
"Melanotic" Ml. Melanotic is dominant, especially for the females, and is able to make
"extended black" and
"birchen" based animals full black. It enhances and shifts black pigment to the edges of the feather. A typical effect is halfmoon spangling on the tips of the feather.
Pattern gene Pg arranges black pigment, eg the stippling, in concentric lines. Pg alone leaves the feather rim (outerlace) groundcolored. The black breast of the rooster can become groundcolor tipped by this effect. This is concentric pencilling or multiple lacing (Pg). Combined with Ml the concentric lines become broader and shift towards the edge of the feather, making the outer rim black: double laced (Pg+Ml). Roosters become quite dark by the action of Ml. By adding
Columbian Co the inner laces are removed and you get single lacing (Pg+Ml+Co). When you add
Darkbrown Db to concentric pencilling then the pencilling becomes transverse: autosomal barring (Db+Pg). Given enough black this will be true barring like in the Campine breed, else the bars are "pinched" at the edges and nerve giving a wheatear type pattern, quill. Adding Melanotic Ml will render complete spangling at the tip of the feather as in the Hamburgh breed: spangled (Db+Pg+Ml). Finally adding columbian will give single lacing again, but not with a solid tail but a laced one as in the Sebright breed (Db+Pg+Ml+Co). Most patterns are on
"partridge/brown" or
"birchen" base.
The latter needs
Darkbrown Db to show pattern.