Old Voltmeter Restoration (Part 1)

We debt our measurements to meter! Today I am gonna restore an old AC voltmeter which was thrown away. Spending some time and money on it leads a dead meter to a restored and stylish meter.
First of all it is needed to reconstruct the chipped corners by using epoxy resin. Before casting the resin, a mould is needed. The mould is made from statue making paste which is readily on the market and must be left in air to harden. The mold is made using two lams which is ubiquitous in labs. The statue paste is used as the support for mould and also as a barrier for running the resin away.



Now it is time to mix rubber silicone with hardener. 1% wt of liquid rubber silicone is enough to let it coagulate. More the hardener, faster the liquid silicone rubber coagulates. Nearly 10 grams of it seems enough to make a mould.


Now it is time to cast rubber silicone resin into mould as follows. The mixture is sticky and it is hard to pour; therefore it is highly suggested that immediately after mixing the hardener with the liquid resin, it is poured into mould.


Then over the course of time the mixture will turn into a rubber mold. This mold is made from the pristine corner; so it can be used for repairing the broken corner. By taking out and pouring epoxy resin in to the broken corner, a new corner like the pristine one will be made. It needs a little bit fine sandpapering and in the end polishing.