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FAQ Content

The later part of the 20th century saw lots of refactoring Pizzighelli’s formulas from the 1880s and early 1890s for printing out platinum. Whereas palladium is pretty genial and prints out fairly easily, platinum is reluctant. One fellow announced back in the 1980s a platinum print out process that by his own acknowledgment really needed a little palladium (and a lot of hydration) to print out.

My ammonium ferric ferrous oxalate makes it possible to print out platinum, stone dry, with no palladium.

For over 140 years printers have tried and failed to do what I demo in this brief video. No mess, no fuss, just mix up the sensitizer and brush it on the dry paper. As with every single demo I have ever made, live or for the camera, I ended up printing the image a bit too light. Maybe it’s the sunglasses! Also, I am well aware that was not the model’s thigh.

Formula:
You want to use about 50% more platinum chloride than you would for any given print (artcraftchemicals.com). More solution means stronger Dmax. Some images need very strong Dmax, some don’t. In this video, I used one extra drop (than I would use of gold or palladium) of the 20% platinum. So, 3 drops 20% potassium platinum chloride. I froze the platinum, thawed it, refroze and rethawed it. Then I added 3 drops 99.9% glycerin (which you can buy almost anywhere). Then 1 drop of 26% ferric oxalate for a contrast boost. Feel free to use ammonium dichromate. Wear big red rubber gloves, a rubber apron, and a splash mask, just in case. Finally, add to all this 3 drops of 40% ammonium ferric-ferrous oxalate prepared with 8 drops of 2% vitamin C.

Prepare the AFFO for this formula by preparing 10 ml of 40% ammonium ferric oxalate. Pour the ammonium ferric oxalate into a bottle. Now add 8 drops of 2% ascorbic acid to the ammonium ferric oxalate. Cap and shake the bottle well for 10 or 15 seconds and you have 10 ml of 40% ammonium ferric-ferrous oxalate.

After you brush the sensitizer onto a sheet of paper suitable for platinum, let it dry totally, completely. Glycerin takes forever to dry — expect an 8×10 to take around 30 to 45 minutes at low RH (~30%) and 75 to 90 minutes at around 70% RH. Print out in sunlight is much faster than a UV box and generally, in my experience, more accurate. Probably because I don’t have so long to waffle on whether the print is ready or not…

Questions? Email richardepuckett@texaschrysotype.com. Visit richardpuckett.tumblr.com (especially for my work with rhodium), www.texaschrysotype.com for sample prints and flickr.com/chrysotypes/. Also see my other videos: gold, platinum-gold, and dry print out palladium.

Glove Buying Guide: http://bit.ly/1zWR6YS

Today, it’s all about gloves. Medline has put together a glove buying guide to help you become a glove expert and choose the right glove for your company or organization.

Let’s review the different types of gloves available and their ideal applications.

There are medical grade gloves, for use in nursing homes, doctors’ offices, hospitals, surgery centers and research facilities, – and non-medical grade gloves, more widely used by car dealerships, chemical manufacturers, janitorial companies, landscapers, restaurants and more.

Gloves are available in three different materials – vinyl, latex and nitrile.

Vinyl gloves, the most economical of the three, are latex-free and great for use in personal care, elderly care and cleaning and any time a general moisture barrier is needed. These are not ideal for chemical resistance and are sometimes susceptible to tearing.

Latex gloves provide a good organic barrier and a comfortable fit and feel. They are more suitable for personal care, surgery, dentistry and first aid. However, there are many people with latex allergies and, depending on how you plan to use your gloves, we ask that you take this into consideration.

Last, but not least, Nitrile gloves are able to provide the fit and feel of latex and feature high puncture, abrasion and chemical resistance. Less elastic than latex, we recommend nitrile gloves for laboratories, emergency response units and more.

We can help you make the right glove selection for your every need from our Medline glove line featuring the latest technology, outstanding fit, comfort, performance and quality assurance.

Call or Email us today for more details and pricing.