Categories
Workshops

Wet Plate Collodion Ambrotype and “Tintype”

Jack and Anna
Jack and Anna – wet plate collodion

An ambrotype is an application of the wet plate collodion technique to make a thin negative image on a transparent material, usually glass, which when viewed against a dark background is seen as a positive image.

In the one day workshop, you will make a wet plate collodion ambrotype – the workshop cost is 60 euro and includes all materials which I have already prepared. You will do all the other processes, exposure, development and finishing.

The process requires coating a scrupulously clean glass plate with a thin layer of “salted” collodion  which is made photo sensitive by immersion in a silver nitrate solution.

While the plate is still “wet” it is kept out of the light and carefully placed in a suitable camera. It is then exposed in the camera, removed, again away from light, and developed in a safe “darkroom”.

The development is “stopped” and the plate is then “fixed”.

The process from sensitisation to fixing needs to be completed before the coating on the plate begins to dry (hence the term “Wet Plate” photography, this process takes, typically, three to five minutes.

After fixing, the plate is dried carefully and then “varnished” to protect the very thin and fragile coating.

Ambrotypes are usually backed by a adarm material or paint – ambrotypes can be coated by a black varnish on the emulsion side – this has the advantage that the image is not reversed and is protected by the glass so separate varnishing is not necessary.

Black glass can be used which avoids a backing material.

A black (or other colour) metal plate can be coated and sensitised instead of glass, this is usually called a “Tintype” although most modern “tintypes” are made on black anodised aluminium..

I have suitable cameras and lenses for the process which you can use – I advise a practical working size of 13 x 18 cm – but you can make an ambrotype (or “tintype”) with just about any camera.

Other collodion workshops will include :-

  • Mixing salted collodion formula (half day 40 euro)
  • Making varnish (half day 40 euro)
  • Maintenance of the silver nitrate solution
  • Making a silver bath tank.
  • Making a (almost) 5 x 4 inch camera for wet plate
Violetta
Violetta – collodion wet plate 13x18cm
Karin
Karin – wet plate collodion 13x18cm
self portrait
self portrait wet plate collodion 13x18cm
Categories
Workshops

Carbon Transfer printing on glass

The carbon transfer one day workshop will guide you through the process of making a print from a photographic negative onto glass.

It is a contact printing process so a negative the same size as the final print is required. This can be anything such as a digital negative, a wet plate collodion negative, a silver gelatine negative or  a calotype,

In the carbon transfer process, the negative is printed by putting it into contact with a  “tissue” which is coated with coloured (I use carbon black) gelatin and then sensitised to light, exposing the sensitised tissue to UV light which proportionally hardens the gelatin in relation to the negative density, placing the exposed tissue into direct contact with carefully prepared glass, developing the glass/tissue “sandwich” in a warm water bath which will separate the tissue from the glass and then dissolve the unhardened gelatin.

The sensitised, coloured gelatin in the tissue, when exposed to UV light, will harden in proportion to the density of the negative in contact with it. Clearer parts (the shadows) of the negative will harden more than the darker parts (the highlights).

The result is a positive print on the glass.

The process is logical and simple – in reality there are many things to go wrong (and they do).

In the workshop I will provide a fresh batch of ready made tissue (black) – pre-mixed and tested sensitiser – cleaned, treated and prepared glass. I do offer special half day workshops for these processes, there is not time to do all this work in one day

I have large temperature controlled 20 liter water baths

These glass prints I then used to make orotones, by coating the image surface with a “gold” varnish or lacquer.

I started working with carbon transfer processes when I was looking for a better way to print a photograph onto a glass surface than by coating the glass with a silver gelatin emulsion.

Categories
Workshops

510 Pyro Developer

I like this developer. It is not hard to make but I wish someone had shown me, hands-on, before I started making my own. Patience and care are needed and I have a few tips and tricks I can share.

This workshop can be combined with others as part of the process can be like watching paint dry.

The cost of the half day workshop is 40 euro

You get to take home a bottle of 510 puro which is probably worth more than the cost of the workshop.

Categories
Workshops

Orotone

A one day orotone workshop

The orotone you will make is a photographic print directly on to a prepared glass surface which is then coated with a metallic emulsion, usually golden in colour. The metal in suspension can be gold, but I usually use a fine brass powder.

The cost for the workshop is 60 euro for the day (usually from 10h00 until 08h00)

All materials and chemicals are provided.

You can bring your own negatives – any size up to 18 x 24 cm – 5 x 7 inch is ideal for the workshop. You can bring digital negatives, although I do not have a scanner, printer or any post production software.

My preferred method is to print onto the glass by carbon transfer. Prepared tissue for the carbon transfer is provided.

Small negatives, from 35mm up to 12 x 17 cm, can be used to print directly onto silver gelatin coated glass plates, but my preferred method of making orotones from small negatives is to first make a good paper print on traditional bromide paper the size of the required orotone and to then use the carbro process to transfer the image to the glass.

With carbon transfer and carbro processes we could make the tissue any colour using colour pigments. The tissue used in this workshop is made from pure carbon black, so for this workshop the colour is black.

It is possible to make a colour print onto the glass using pigments and the careful registration of separate negatives, but this is not part of this workshop.

The image is behind a glass surface, by using carbon processes for printing and with the museum archival quality coating, an orotone should last forever (unless you break the glass).

The physical depth of the carbon print and the glass give a vitality to the orotone which cannot be shown on a screen – I have some videos which do show this a little better.

Orotone portrait

 

 

 

 

 

Old chestnut