The Stain Library

How to remove baby sick from a photograph

  • DifficultyProfessional
  • OutlookRarely removable
  • MaterialPhotograph
  • Reviewed7 September 2026

The short answer

Do not touch the front of a wet photograph. Conservators are explicit that the emulsion must not be touched or allowed to contact anything as it dries, because it is soft when wet and the image lifts off. Separate the print from its sleeve, album or neighbours, lay it face up on absorbent paper with air circulating, and let it dry untouched. If there are too many, freeze them interleaved with waxed paper.

If it has just happened

Separate the photograph from anything it is touching, straight away, and lay it face up. A wet emulsion bonds to whatever it dries against and cannot be parted afterwards without losing the image.

Heat can set this stain permanently

Do not use hot water, a tumble dryer, an iron or a steam cleaner until the mark has gone. Heat fixes this type of stain into the fibres and makes it far harder to shift.

Test on a hidden area first

Try any cleaner on a hidden part of the material first, such as a seam, an offcut, inside a hem or under a piece of furniture. Wait for it to dry and check for colour change before treating the visible mark.

Cleaning the mark is not the same as disinfecting

If the sickness came with a stomach bug rather than an ordinary posset, the surface may carry norovirus, which spreads easily and survives on hard surfaces. UK public health guidance is to wear gloves, avoid shaking contaminated laundry, wash affected laundry separately with normal powder at 60 C where the care label allows it, and disinfect compatible hard surfaces with a bleach based product afterwards. Do that after the stain work, not instead of it, and only where the material tolerates it.

Keep every kind of drying heat away until the mark has gone

Baby sick is mostly milk protein. Heat coagulates protein and locks it into the material, which is why a mark that would have washed out can become permanent after one hot wash, one pass with an iron, a hairdryer or a spell on a radiator. Cool or warm treatment, air drying, and a proper look in daylight before anything warm goes near it.

If you cannot dry it within two days, freeze it

Archives freeze wet paper that cannot be dried quickly, because mould begins within about forty eight hours and mould on paper cannot be undone. Freezing does not treat anything, it stops the clock. Bag the item, freeze it, and deal with it or get advice when you have time. The exception is photographs, where prints can be frozen interleaved with waxed paper but glass plate negatives and tintypes must never be frozen at all.

What you will need

  • Disposable gloves Sickness that came with a stomach bug is a hygiene job, and clean dry hands matter on paper anyway.
  • A soft brush For lifting dry material off. This is the main tool.
  • Clean white blotting paper or kitchen roll For absorbing, laid against the surface rather than rubbed on it.
  • A fan Air circulation is what dries paper. Not aimed straight at it.

Helpful but not essential

  • Unprinted newsprint or kitchen roll for interleaving Absorbent and free of ink that could transfer.
  • A freezer bag Freezing buys time when something cannot be dried within a couple of days.

Fresh baby sick on photograph

Separate it from anything it is touching, lay it face up to dry, and do not touch the front.

  1. Separate it from sleeves, albums and other prints

    Hold it by the edges only. A wet emulsion will bond to plastic and to another photograph as it dries, and cannot be parted afterwards.

  2. Lift solids off the border, not the image

    Only if they are sitting loose, and only at the edge. Nothing touches the image surface while it is wet.

  3. Lay it face up on clean absorbent paper

    Blotting paper, unprinted newsprint or kitchen roll. Face up, so nothing rests on the emulsion.

  4. Circulate air and leave it

    A fan in the room rather than aimed at the print. Do not blot the front, do not wipe it and do not try to speed it up.

  • How longTen minutes, then a day
  • RepeatingChange the absorbent underneath, not anything on top.
  • Stop ifthe print is drying face up, separated from everything, with air moving in the room

Dried baby sick on photograph

Brush loose material off the border and the back of the print, and leave the image alone.

  1. Confirm it is completely dry

    Gelatin stays soft while any moisture remains. If in doubt, give it another day.

  2. Scan or photograph it now

    Before any further handling. A digital copy can be repaired even if the print cannot, and this step costs nothing.

  3. Brush loose material off the border and the back

    A very soft brush, at the edges only. Do not brush across the image and do not use an eraser on a photograph.

  4. Flatten it under a weight

    Between clean dry sheets with a book on top for a week. Prints curl as they dry and this takes most of it out.

  • How longTen minutes, then a week under weight
  • RepeatingOne very light pass.
  • Stop ifloose residue is off the border and back and the print is flattening under a weight

What not to use on photograph

  • Rubbing or wiping the surface

    Wet paper is very fragile and the surface skins off under a cloth. Conservators treat surface cleaning as a dry mechanical process with soft brushes, and even then warn that it can abrade weak paper.

  • Adding water, detergent or any cleaning product

    Water spreads the stain, cockles the sheet and can lift or run the ink. There is no household product that improves a stain on paper and several that destroy it.

  • A hairdryer, a radiator or direct sunlight

    Heat sets milk protein, cockles and embrittles paper, and can cook a photographic emulsion. Archives specify circulating air rather than heat for exactly this reason.

  • Ironing it flat

    It sets the stain permanently, scorches paper and melts emulsions and coatings. Flattening under weight after drying is the safe equivalent.

  • Bleach, hydrogen peroxide and stain removal pens

    These are used in professional paper conservation under controlled conditions and they weaken and yellow paper when used blind. On anything that matters, they are how a stain becomes a hole.

  • Touching or blotting the wet image surface

    Conservators state plainly that the emulsion must not be touched or allowed to contact anything as it dries. Anything laid on a wet photograph takes image with it.

  • Pulling apart prints that have stuck together

    The emulsion bonds as it dries and separating them tears the image off. Freeze them interleaved and get advice instead.

  • Freezing glass plate negatives, ambrotypes or tintypes

    Conservators state these must never be freeze dried, because they will not survive it. Prints can be frozen; these cannot.

White compared with coloured photograph

The image is the emulsion, so there is no separation here between protecting the appearance and protecting the object. Anything that touches a wet emulsion takes part of the picture with it, including a cloth, a fingertip, a plastic sleeve and another photograph. Colour prints are more vulnerable than black and white, and resin coated prints dry faster and more safely than older fibre based ones.

If the mark is still there

Leave it alone until it is bone dry, which usually means a day. Expect it to curl.

Once dry, a very soft brush lifts loose surface residue from the border and the back. Do not brush the image area, and do not use an eraser on a photograph at all.

Before anything else, scan or photograph what you have. A damaged print can be copied and repaired digitally, and that route is available to anyone and costs nothing. Photographic conservators exist and are the right answer for something irreplaceable, but a good scan is the step that protects the content whatever you decide afterwards.

Flatten a curled print between clean sheets under a weight for a week once it is completely dry.

When to stop and call someone

Use a photographic conservator rather than continuing if the print is the only copy of something irreplaceable, if prints have stuck together or to their sleeves, or if the emulsion has lifted anywhere. Before anything else, scan or photograph what is left, because a good digital copy can be repaired even when the original cannot.

Why baby sick behaves this way on photograph

A photographic print is an image suspended in a gelatin emulsion on a paper or resin coated base.

The emulsion is the image

When it is wet, gelatin swells and softens. In that state it scratches under a fingernail, lifts under a cloth and bonds to anything it dries against. Conservators do not say be careful with it, they say do not touch it.

Sticking is the common failure

Photographs in an album or a sleeve stick to the plastic and to each other. Separating them while wet is possible; separating them once dry is not.

Freezing buys time, with exceptions

Prints can be frozen interleaved with waxed paper or polyester. Glass plate negatives, ambrotypes and tintypes must never be freeze dried, and old negatives are best kept out of a freezer.

The digital copy is the real safeguard

Most of what people want from a photograph is the image rather than the object, and a scan preserves that even when the print is damaged.

Sources

What we checked and when. Where a manufacturer instruction disagrees with anything here, follow the manufacturer.

  1. Emergency salvage of flood damaged family papers, US National Archives authority

    National archive guidance that paper is very fragile when wet and must be handled carefully, that wet material is air dried on absorbent blotting material with fans circulating air but not blowing directly onto it, that books are stood open on edge with interleaving replaced as it absorbs moisture, that material which cannot be dried within two days should be frozen to stop mould, and that photographic print surfaces must not be touched.

    Checked 7 September 2026

  2. Surface cleaning of paper, Northeast Document Conservation Center authority

    Conservation centre guidance on dry surface cleaning of paper, establishing that surface cleaning is a mechanical dry process using soft brushes and erasers rather than liquids, that it is carried out with the object supported and worked from the centre outwards, and that it can abrade or skin weak paper and media, so friable, coated and damaged surfaces are left to a conservator.

    Checked 7 September 2026

  3. How to remove baby formula stains, Purex Stain Lab manufacturer

    Manufacturer guidance identifying breast milk, formula and baby spit-up as protein stains, explaining the role of enzymes, and warning that the mark should be checked before any drying heat because heat sets what remains.

    Checked 7 September 2026

  4. Norovirus: what to do and how to stop the spread, UK Health Security Agency authority

    UK public health guidance establishing that illness related vomit can carry norovirus, that contaminated laundry should be washed with normal powder at 60 C where the care label permits, and that compatible hard surfaces should be disinfected with a bleach based product.

    Checked 7 September 2026