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    Jan Kratochví fotograf Třebíč
    Fotografie analogová, digitální, ušlechtilé tisky Fotografie na kolodium: http://www.kolodium.cz Kontakt: +420 702 147 081 info@jankratochvil.com --- Analog & digital photography,fine art prints. Photographs on collodion: http://www.kolodium.cz Contact: +420 702 147 081 info@jankratochvil.com
  • About Me

    Jan Kratochví fotograf Třebíč
    Photography analog, digital, fine art prints
    Photos on collodion: http://www.kolodium.cz
    Contact:
    +420 702 147 081
    info@jankratochvil.com
    ---
    Analog & digital photography, fine art prints.
    Photographs on collodion: http://www.kolodium.cz
    Contact:
    +420 702 147 081
    info@jankratochvil.com

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Wet Collodion: A Weekend Adventure with the Glass Negative

Last weekend offered me the opportunity again - to create another collodion glass negative in my studio in Třebíč. I set to work with enthusiasm, knowing that this process requires time and a precise approach.

Glass preparation:

The first step was the careful preparation of the glass. After a thorough cleaning, I applied a layer of egg white to the edges to prevent loss of collodion during processing. Although it seems easy, it is a time-consuming process that requires patience and precision.

 

@jan.kratochvil

Final glass cleaning for wet plate collodion negatives and ambrotypes. Final glass cleaning for wet plate collodion negatives and ambrotypes.

♬ original sound - Jan Kratochvíl
Final cleaning of the glass after several previous cleanings.

Indoor photography:

Indoor wet collodion photography is a challenge due to the lack of light. In order to achieve a sufficient exposure of the negative, I had to carefully adjust the lighting conditions. As an object, I chose an old hunting weapon – a shotgun, a gift from my father. I am the third generation to own this weapon. My grandfather, dad, and now I – all hunters – owned a shotgun.

Of course, the shooting took place in such a way that I observed proper safety and the cartridges in the cartridge chamber were not sharp.

Testing and exposure:

Before making the negative, I did a test exposure on the plate and then on the glass for the positive. Based on these tests, I estimated the exposure time for the final negative.

Development and redevelopment:

Under ideal conditions, double exposure is not usually necessary for negatives. However, in this case, after development and evaluation, I came to the conclusion that the density of the negative is not sufficient for quality copying. This was followed by a second development with a freshly mixed developer for the so-called redevelopment, which lasted less than an hour.

Varnishing and printing:

After development and fixing, I varnished the negative to protect the collodion layer. It is now ready for copying positives onto paper. For this process I chose collodion-chloride paper of my own production.

Advantages of the positive collodion process for collodion-chloride paper:

The collodion process is one of the most durable photographic processes. The collodion layer protects the image from environmental influences and prevents the yellowing that is common with old silver bromide photographs.

 

 

Difficulty and workshops:

As the size of the negative increases, so does the complexity of the entire process. Handling wet glass requires care to avoid damaging it. If you are attracted to this fascinating technique and want to learn it, I offer individual workshops.

Conclusion:

The weekend adventure with the glass negative brought me valuable experience and a beautiful original image and the opportunity to create more photos. 
If you are interested in this interesting photographic process, do not hesitate to contact me and learn more. Workshops take place in my studio in Třebíč or by appointment.

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Jan Kratochvil Photographer / analog & digital photographer

Jan Kratochvil Photography is in the Jewish Cemetery.

1 day ago

Jan Kratochvil Photography
Židovský hřbitov v Třebíči jsem v září 2026 nafotil panoramatickým fotoaparátem Horizont. Na této druhé fotografii ze slunečného zářijového dne roku 2026 mě zaujala naložená kárka ve stínu stromů, která kontrastuje s náhrobními kameny opřenými o nízkou zídku, která je obrostlá břečťanem 🍃Hřbitov je spolu s židovskou čtvrtí a bazilikou sv. Prokopa od roku 2003 zapsán na seznamu UNESCO.Je na něm kolem 3 000 kamenných náhrobků a nejstarší pochází z roku 1631.Fotografie jsou rovněž na mém webu: jankratochvil.com/cs_cz/horizont-zidovsky-hrbitov-trebic-unesco/ ...

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Jan Kratochvil Photography is in the Jewish Cemetery.

1 day ago

Jan Kratochvil Photography
Židovský hřbitov v Třebíči jsem v září 2026 nafotil panoramatickým fotoaparátem Horizont. Široký záběr 120° mi umožnil zachytit řady náhrobků na svahu tak, jak je člověk vnímá, když jimi prochází.Většinou fotím na černobílé filmy Foma a vyvolávám si je sám. Skeny jsou bez velkých zásahů a nedokonalosti z ručního vyvolání jsem většinou ponechal.Hřbitov je spolu s židovskou čtvrtí a bazilikou sv. Prokopa od roku 2003 zapsán na seznamu UNESCO.Je na něm kolem 3 000 kamenných náhrobků a nejstarší pochází z roku 1631.Fotografie budu průběžně zveřejňovat na svém webu: jankratochvil.com/cs_cz/horizont-zidovsky-hrbitov-trebic-unesco/ ...

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Jan Kratochvil Photography přidal(a) 18 nových fotek — v Josef Sudek Gallery.

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Fotky z příspěvku Jan Kratochvil Photography ...

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Jan Kratochvil Photography is in the Vysočina Region.

3 weeks ago

Jan Kratochvil Photography
Jiné i ne zcela bystré oko si může všimnout, že v horní části je vidět světlá část ➡️ to je to, co se mi podařilo, když jsem otevřel kazetu a záhy si uvědomil, že tam mám nevyfocený film. 😅No nic, je potřeba víc fotit, takže tady jedna nastojato! Foceno Stenopeika 4x5”, Fomapan filmDatum: 09/2026Lokace: Třebíč#analog #stenopeika #fomapan #rebic #filmisnotdead ...

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Jan Kratochvil Photography added a new photo.

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Tak jsem letos poprvé vytáhl StenopeiKa aparát ven.StenopeiKa 4x5" & Fomapan09/2026Trebic ...

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Jan Kratochvil
  • About Me

    Jan Kratochví fotograf Třebíč
    Photography analog, digital, fine art prints
    Photos on collodion: http://www.kolodium.cz
    Contact:
    +420 702 147 081
    info@jankratochvil.com
    ---
    Analog & digital photography, fine art prints.
    Photographs on collodion: http://www.kolodium.cz
    Contact:
    +420 702 147 081
    info@jankratochvil.com






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