by Joe Farina » Fri Dec 21, 2018 8:53 am
Unfortunately, not repairable. Sorry.
I might suggest checking eBay from time to time, for a similar DCG watch by Lasart. They do show up, now and then. The following is a sold listing, but this seller has quite a collection of DCG which he sells regularly on eBay (you might want to look at his sold listings also, in addition to the current ones):
https://www.ebay.com/itm/Hologram-Lasar ... 7675.l2557
What happened with yours is that moisture penetrated the edge of DCG (dicromated gelatin) layer, which is sealed (somewhat) between two pieces of glass, with some kind of clear optical adhesive. (One plate has the DCG layer, adhesive is applied on top of that, and the other piece of glass is brought into contact to form a sealed sandwich.) Moisture gets in the edge of the sandwich, and begins to collapse the tiny air voids in the gelatin layer. The combination of air voids/solid gelatin throughout the gelatin layer provides the index modulation to enable the hologram to reconstruct an image.
With older DCG holograms especially, it can be a hit-and-miss affair with regards to longevity. It depends on the knowledge, care, and effort that went into the sealing of the hologram. If the quality of the sealing is unknown, DCG holograms should be kept in a dry indoor environment at all times, less than 70% RH, preferably less than 65%. The below photo below shows a hologram I bought a couple months ago. This hologram may have been made in the 70's or 80's, but I'm not sure. When I received it, it was in perfect condition. I removed the metal band. There was some kind of shellac-like adhesive that was applied around the perimeter of the glass sandwich, to guard against water vapor penetration at the edge. I removed this adhesive, and within maybe a month, the hologram started to vanish along the edges (visible at the left bottom edge of the image in the photo). This hologram was even kept inside a dry house during the last couple of months.
- PC200014.JPG (60.2 KiB) Viewed 5888 times
Unfortunately, not repairable. Sorry.
I might suggest checking eBay from time to time, for a similar DCG watch by Lasart. They do show up, now and then. The following is a sold listing, but this seller has quite a collection of DCG which he sells regularly on eBay (you might want to look at his sold listings also, in addition to the current ones):
https://www.ebay.com/itm/Hologram-Lasart-Watch-Spoked-Star-Needs-Battery-/332837427121?hash=item4d7ea817b1%3Ag%3A0U4AAOSw85Jbv93e&nma=true&si=mTfAO74rGIdIUscEndhd0j94uew%253D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557
What happened with yours is that moisture penetrated the edge of DCG (dicromated gelatin) layer, which is sealed (somewhat) between two pieces of glass, with some kind of clear optical adhesive. (One plate has the DCG layer, adhesive is applied on top of that, and the other piece of glass is brought into contact to form a sealed sandwich.) Moisture gets in the edge of the sandwich, and begins to collapse the tiny air voids in the gelatin layer. The combination of air voids/solid gelatin throughout the gelatin layer provides the index modulation to enable the hologram to reconstruct an image.
With older DCG holograms especially, it can be a hit-and-miss affair with regards to longevity. It depends on the knowledge, care, and effort that went into the sealing of the hologram. If the quality of the sealing is unknown, DCG holograms should be kept in a dry indoor environment at all times, less than 70% RH, preferably less than 65%. The below photo below shows a hologram I bought a couple months ago. This hologram may have been made in the 70's or 80's, but I'm not sure. When I received it, it was in perfect condition. I removed the metal band. There was some kind of shellac-like adhesive that was applied around the perimeter of the glass sandwich, to guard against water vapor penetration at the edge. I removed this adhesive, and within maybe a month, the hologram started to vanish along the edges (visible at the left bottom edge of the image in the photo). This hologram was even kept inside a dry house during the last couple of months.
[attachment=0]PC200014.JPG[/attachment]