Porthole Glazing
Following the discussion on ways to make the porthole glazing further up, I looked over all available photographs and came to the conclusion that one does not actually seem to see the bronze frame from the outside. On the other hand, most photographs or their scans do not have sufficient resolution to really see such detail.
In order to make my life simpler, I decided to go for solid Plexiglas plugs. I did have 1 mm Plexiglas rod in stock and short sections were cut from this to make 2 mm long plugs. The plugs have to be a bit longer than their diameter, so that they can be inserted straight. The front face was turned flat on the lathe and the back-end was given a bit of a chamfer for easy entry into the pre-drilled holes after which it was painted black using a black permanent marker pen. The pieces were then transferred to the micro-mill for polishing the front face with a silicon rubber polishing bit.
In order ensure that the porthole plugs are set at equal depth, a little ‘tool’ was made, a punch with a recess of 0.3 mm depth around the rim.
Collection of Plexiglas plugs ready for insertion
Glazed portholes
Glazed portholes
To be continued ....
By
wefalck ·