Catherine,

I received an email from Pál Toth in Hungary to your request for info - hope this helps-

Generally, need to make a perfect dial design, / I draw the clock-face - dial design - on the thin transparent Canson papír /40 - 50 grm/m fine quality the best / with a hard graphit pencil. The graphit lines - numbers -, will be hard and strong ! After, the back side of the tracing papír I make a homogen graphit coat, a midle tone gray coat more times. Nex step, I fixing the enameled dial-plate on the hard and dick papír-board, and I put the transparent papír over the enamelled surface carefully with graphit coated back-side, the graphite coat will be on the enamelled surface, and I fixing the drawing also. With this methode, can not moving the plate and the design-drawing. So thus I can to pressing throught with a stubby polished steel-nadel the design linea drawing - the clock numbers - step by step. After this pressed-work on the glossy enamel-surface You can see the nice and clear gray graphite lineas, drawing of the numbers. This is the practical and exact methode. After this procedure need mixing the overglase painting colour with some drops anise oil or lavender oil. I use a glass or achate palette-plate mixing the painting colours and a good hardsteel  palette-knife or a scalpella. Generally I paint the numbers of the clock-dial with black overglase painting colour or with black ceramic-pigment./example from Thompson/ I paint with fine minimum 000 size round brush, sometime I use steel fine drawing-pen, but to me best the brush. When I finished the painting methode, need drying under the infra-lampe, or on the hot-plate /electric reso/ some minutes and after the drying under the lupe need to make retushing and last step the firing on 780 -790 C grad. The firing time 1,5 - 3 minutes. If need, will be paint a new coat ! Best Wishes !  - Good Work !   - Bye !  Pál Tóth - Perhaps I can Help with my methode for Catherine !