Sunday, July 19, 2020

Holograms on chocolate

DIY process to copy commercial holograms onto chocolate! Completely edible -- no dyes or inks used. Tech Ingredients' video: Samy Kamkar's diffractive chocolate: Hologram stickers: Silver mirror process: Add a pinch of sodium lauryl sulfate to the stannous chloride primer solution to help the solution get into contact with the plastic surface. Morphotonix: Caswell nickel electroplating kit: (Price was already pretty high years ago, and has gone up a lot since; and the kit has fewer components than it used to. But it does work well.) Holography Marketplace book -- lots of very practical information for making your own holograms, and good source of suppliers (though many are out-of-business now): Very good source for mold making supplies: Countermeasures against hologram copying. Holograms are often used as a security seal, so making copies as shown in the video could be a problem without countermeasures: I was planning to talk more about different types of holograms in technical detail, but I think I will save it for a future, dedicated video on making original holograms.


  1. Hello, I write software games for 9+ years am looking to see if you want to take the lcd you were working on alittle further for the games I can make for it. contact back:

  2. Hello, what kind of glue do you use for this experiment? I'm trying to recreate this experiment and I don't want to poison myself

  3. Hi Ben, great Job, love your channel
    Perhaps a topic of interest for you are hologram printers, see here a hologram I printed on photopolymer with my DIY printer:
    Keep up the good work!

    1. Very well done! Are you going to post more details about the printer/process? I'm sure lots of people would want to see it!

  4. Thank you Ben,

    This other video ( shows a bit more about the printer and how it works:

    A 3D digital scene is rendered on a PC graphic card and displayed on a Spatial Light Modulator (SLM) (eg. from a home-cinema projector).
    A laser beam is plit in two;
    First beam (the object beam) is fed through the SLM, then through a 4F optical setup and finally focused onto the holographic film via a high NA lens.
    Second beam (the reference beam) is shaped through various optics then focused down on the holographic film, superimposed with the object beam. Both beams interfere and the film records the resulting interefrence pattern.
    The point on film at which both beams are superimposed is called a hogel (ie. a "Holographic Pixel"). Typical hogel diameter is in the 100-1000 microns range.
    The holographic film is scanned in a raster fashion and hogels are recorded on the whole film area.
    It is important to note that each hogel records a slightly different point of view on the 3D digital scene, thereby recording the whole 3D scene on the film.
    In practice it is not too difficult to implement a monochromatics basic printer; things get more difficult when colour and high resolution are desired ;)

    1992_01_Applied Optics Volume 31 issue 2 1992 [doi 10.1364_AO.31.000217] Yamaguchi, Masahiro; Ohyama, Nagaaki; Honda, Toshio -- Holographic three-dimensional printer- new method-1
    2018_02, PROCEEDINGS OF SPIE OPTO, Madrid Sánchez, Alejandro, Velásquez Prieto, Daniel -- Design, development, and implementation of a low-cost fullparallax holoprinter