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Hot lacquering of brass
May 31, 2015
Here it is, my first perfect piece of lacquering. It’s been six months since I started this mission. I have messed around with lacquer recipes, I have altered resin proportions, I have tried different polishing methods, different cloths and brushes, different temperatures and finally I have success.
One of the keys to success has been a sunny day – not generally something I can control but it certainly makes a difference.
Getting the finish on the metal right has been challenging. I don’t want the microscope to look like a reproduction but I don’t want it to be full of pits and bumps either. Restoring an antique microscope has to be done sensitively, I’m going for old but in good nick, not brand-new-reproduction made in a Chinese factory.
I’m very pleased. Now I have to do the rest of the microscope to the same standard.
No flash was used on these pictures.
PERFECT LACQUERING
May 30, 2015
I just did some perfect lacquering! it’s taken six months to achieve but I’ve done it!!!
I have been fighting with this lacquering for so long. I have put it on, taken it off, put it on again…
Every time I have had streaks or runs or patches or it’s been okay but too thick (and hence a funny orange colour).
I figured it was best to give up on this microscope and change over to a simpler style of microscope with fewer fiddly bits. A little Royal Society of Arts microscope. I deccided to have one last bash and it worked.
It seems to come down to two things – the cloth must be very moist but not dripping with lacquer and the lacquering must be done quickly, ideally within 20 seconds.
I’m in the process of stripping another not quite perfect part of the microscope now. I’m not going to strip the focus knobs though, they are very fiddly and I need to move on. I don’t want to get bored and lose interest.
Live motile diatoms
May 17, 2015
Just some diatoms that I filmed on the M4000 today. Very busy little things. A quick google informs me that they move using an actin/myosin system. Little tiny muscles, cute.
400x magification.
Less common protozoans
May 5, 2015
I have been looking at pond water and have come across some protozoans I have never seen before.
The first is Pleuronema, it looks like a paramecium but I couldn’t figure out what the “flagella” were. Turns out they aren’t flagella, Pleuronema fishes for food using a net of cilia. Rather interesting little beastie, I made a video of it.
Here is a picture of the other beastie I found, a Loxophyllum, it glides in a most beautiful way. It’s quite large. The pictures below were taken using a 20X objective whereas the video was taken using 40X. I wasn’t able to video the Loxophyllum because it was quite swift as well as elegant.
Loxophyllum
Loxophyllum
Loxophyllum
My first attempts at lacquering
January 21, 2015
This is one of my first attempts at re-lacquering a Watson Praxis. The old lacquer was almost non-existant so I stripped it off using ammoniated cleaner (nasty stinky stuff), then sanded, polished and grained the tube before applying lacquer.
The lacquer is a turmeric and shellac based lacquer. It’s okay but I feel it needs to be tougher than it is. It doesn’t look like it will last 100 years. This week I shall be trying to perfect my lacquer recipe by adding some resins, wish me luck!
Re-lacquering of Watson Praxis Tube
Written
on February 14, 2016