Wanted Coherent Compass 315m or similar for Holography. In UK

[Grayham]

The lasers on it's way and I have my tracking number. All good.
I must say I'm looking forward to building it on to some nice heat sinks and and having a play. I currently have an unopened box of 20 Colour Holographic BB520 plates so I best try and make something beautiful to justify to the missus the money I'm spending. I'm still learning so probably a few more "Porcelain Cats"

Thanks to everyone that chipped in to the thread. Most helpful

Thank you
Grayham

[Jem]

Would I be correct in assuming the BB520 plates are 5" x 4"? If so, i'd be inclined to cut a few of them into quarters so you don't waste as much whilst learning and getting the exposures right. I have to confess that I didn't do this and I wasted quite a number of plates .

Did you buy the plates recently?, I thought ColourHolographics had stopped selling them. If the plates are over 12 months old you can make them more sensitive by giving them a soak in 5% Triethanolamine (TEA) solution and then washing it out and drying prior to exposure.

[Grayham]

Hi Jem

The plates came delivered just after Xmas. They are 2.5" x 2.5" and are still available as are other sizes. They work out at £66.80 including VAT and delivery. I must say I went through about 30 plates getting my exposures and chemistry correct but I did produce a couple of good holograms. 10 of those plates they gave to me foc so I could get used to them and see if I liked them and I was very much appreciative of this as helped me loads.
I found these plates really robust. I post colour shifted one hologram with different concentrations of citric acid, with squeegeeing, dried with a hair dryer and washed back out again about 20 times and it was still perfect at the end. I was quite impressed by this

I found after a few weeks they can become less sensitive and the documentation I have states this and says you can re sensitise with just water, a 3 min soak and air dry or with a 3% TEA solution. I found the water alone works fine.

I'm quite new to this so I still have lots to do work on producing bright holograms, but I do love the different colours you can produce with the citric acid post shift and if you make a mistake you can wash it out.. The next hologram is going to be planned with correctly calculated exposure times, developing times etc. I think I need to buy a shutter with the new laser

Kind Regards
Grayham

Would I be correct in assuming the BB520 plates are 5" x 4"? If so, i'd be inclined to cut a few of them into quarters so you don't waste as much whilst learning and getting the exposures right. I have to confess that I didn't do this and I wasted quite a number of plates .

Did you buy the plates recently?, I thought ColourHolographics had stopped selling them. If the plates are over 12 months old you can make them more sensitive by giving them a soak in 5% Triethanolamine (TEA) solution and then washing it out and drying prior to exposure.

[Jem]

That's great news that they are still available.

I wish you every success and hope all your holograms turn out bright.

Cheers

Jem

[142laser]

Sam and I have 215M and 315M lasers for sale if anyone needs green holography lasers. We have from 10 mW to over 150 mW, a 200 mW Cobolt, a 400 mW Lightwave...yeah we got that.

[Grayham]

Just wanted to say the laser turned up well packed and in excellent condition. It all fires up and locks as it should do. Hopefully I will have it all mounted this weekend and ready to make some holograms.

Brian, thank you for getting the laser out so quickly and so well packed it's appreciated.

Grayham

[Jem]

That's great news Graham. Really pleased it arrived safely for you. Don't forget to post a few pictures of your first holograms.

Regards

Jem