Difference between revisions of "Ewesly / Holographic Formulae / BBAA, JD-4, TJ-1"
m (→JD-4 Kit) |
m (Jsfisher moved page Ewesly / Holographic Formulae / BBAA, JD-4, TJ1 to Ewesly / Holographic Formulae / BBAA, JD-4, TJ-1 without leaving a redirect) |
||
| (One intermediate revision by the same user not shown) | |||
| Line 23: | Line 23: | ||
=== Development time === | === Development time === | ||
<p>5 minutes at 20C (68F) for BB series plates.</p> | <p>5 minutes at 20C (68F) for BB series plates.</p> | ||
| − | <p><u> | + | <p><u>Agitation</u>: Constant</p> |
== JD-4 Kit == | == JD-4 Kit == | ||
| Line 32: | Line 32: | ||
makes twice as much soup for half the price!) This developer, used in the | makes twice as much soup for half the price!) This developer, used in the | ||
cold water JARB developing scheme, works excellently for the ultra-fine grained | cold water JARB developing scheme, works excellently for the ultra-fine grained | ||
| − | Soviet-style materials like PFG-03M or GEO-3<ref>[[Media:chprocess.pdf | Colour Holographics brochure]</ref>.<br /> | + | Soviet-style materials like PFG-03M or GEO-3<ref>[[Media:chprocess.pdf | Colour Holographics brochure]]</ref>.<br /> |
</p> | </p> | ||
<p><u>PART A | <p><u>PART A | ||
| Line 46: | Line 46: | ||
<p>Mix equal parts together before use.<br /> | <p>Mix equal parts together before use.<br /> | ||
</p> | </p> | ||
| + | |||
=== Development time === | === Development time === | ||
| − | + | 45 seconds at 22C (72F) for Harman HoloFX plates. <br /> | |
30 seconds at 18C (65F) for GEO-3 and PFG-03M. <br /> | 30 seconds at 18C (65F) for GEO-3 and PFG-03M. <br /> | ||
| − | + | 5 minutes at 20C (68F) for BB series plates. | |
| − | <p><u>Agitation | + | <p><u>Agitation</u>: Constant<br /> |
</p> | </p> | ||
| − | == Recommendations == | + | === Recommendations === |
<p>Primary recommendation for developing the GEO-3 and PFG-03M materials. Follow | <p>Primary recommendation for developing the GEO-3 and PFG-03M materials. Follow | ||
with a rehalogenating/diffusing bleach for no emulsion shrinkage, or 'Chrome bleach | with a rehalogenating/diffusing bleach for no emulsion shrinkage, or 'Chrome bleach | ||
| Line 62: | Line 63: | ||
helps prevent the color from shifting with these materials.</p> | helps prevent the color from shifting with these materials.</p> | ||
| − | == Shelf Life == | + | === Shelf Life === |
<p>Part A can last a month in a tightly stoppered bottle; Part B can last indefinitely. The combined solutions can last at least a day in a covered tray. | <p>Part A can last a month in a tightly stoppered bottle; Part B can last indefinitely. The combined solutions can last at least a day in a covered tray. | ||
<br /> | <br /> | ||
Latest revision as of 20:29, 1 January 2014
The first time I saw this formula was in the instruction sheet for the old HRT BB series of plates when they were produced in Germany. So back in the 20th century I dubbed it BBAA, for Birenheide and Blyth Ascorbic Acid, but I might be the only one calling it this. The original pamphlet did not give it a name. A colleague of mine, Rick Bruck, calls it HRTd, Holographic Recording Technology developer. Steve (LoserSmith) Smith calls the diluted version of it TJ-1, which TJ calls JD-4. (See below.) The current producers of the BB series of plates, Colour Holographic, have replaced the metol with 1 g of phenidone plus a couple other tweaks in their currently recommended developer[1] for these plates.
Contents
BBAA
from Holographic Recording Materials, circa 1997[2]
4 g Metol
25 g Ascorbic Acid
70 g Sodium Carbonate
15 g Sodium Hydroxide
One litre water
Development time
5 minutes at 20C (68F) for BB series plates.
Agitation: Constant
JD-4 Kit
But the exact same ingredients are used in the JD-4 kit sold by
Photographers Formulary[3], but broken into A and B solutions, so that the
JD-4 working strength is half of that of the original BBAA formula. (The original
recipe put all the ingredients in just one litre of H20; so an A/B configuration
makes twice as much soup for half the price!) This developer, used in the
cold water JARB developing scheme, works excellently for the ultra-fine grained
Soviet-style materials like PFG-03M or GEO-3[4].
PART A
4 g Metol
25 g Ascorbic Acid
One litre water
PART B
70 g Sodium Carbonate
15 g Sodium Hydroxide
One litre water
Mix equal parts together before use.
Development time
45 seconds at 22C (72F) for Harman HoloFX plates.
30 seconds at 18C (65F) for GEO-3 and PFG-03M.
5 minutes at 20C (68F) for BB series plates.
Agitation: Constant
Recommendations
Primary recommendation for developing the GEO-3 and PFG-03M materials. Follow with a rehalogenating/diffusing bleach for no emulsion shrinkage, or 'Chrome bleach for change of replay wavelength in the reflection mode.
This developer, even followed by a rehalogenating bleach, applied to BB series plates gives a significant amount of shrinkage, from red to green, which might be a pleasant color for the application. Kodak D-8 or a pyrogallol-based developer helps prevent the color from shifting with these materials.
Shelf Life
Part A can last a month in a tightly stoppered bottle; Part B can last indefinitely. The combined solutions can last at least a day in a covered tray.
Notes and References
- ↑ I would love to link to their current recipes, but their latest (April 2011) web site does not have a processing page. Click here to link to a pdf of the last one that I had downloaded from 2008.
- ↑ Holographic Recording Technology brochure
- ↑ Photographers’ Formulary JD-4 kit
- ↑ Colour Holographics brochure
