Half a croissant, on a plate, with a sign in front of it saying '50c'
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Bread Pen

For writing on bread
  [vote for,

A pen-sized aerosol spray with a very thin, fine jet. Contains a dark-brown liquid food dye.

Use to mark sandwiches after they're made - "mustard", "no mayo", "veggie", "with pickle" etc.

Saves confusion at picknics and parties - avoids a lot of peeling, peering, and sniffing.

8th of 7, Aug 02 2009

Airbrush cake decorating supplies http://www.cake-dec...IEWCATS&Category=20
Current state of the art. Not exactly in a convenient pen. [jutta, Aug 03 2009]


       You could make it from penne and use squid ink, then maybe boil it and eat it later.
nineteenthly, Aug 02 2009

       Good link, [21], however they will only write on a reasonably smooth, hard surface. That would be OK if you used a ricepaper label with an edible adhesive. But they won't write effectively on the surface of a cut slice of bread.
8th of 7, Aug 02 2009

       prefer black to brown. +1 good idea.
po, Aug 02 2009

       I have an idea for a pen that writes on rice paper using edible chocolate ink... won't bother posting it now +
xenzag, Aug 03 2009

       I would tend to write on the sandwich wrapper, whatever it happened to be.
phoenix, Aug 03 2009

       The wrapping idea is OK for a picnic but when you want to lay an assortment of sandwiches out on a tray at a party that doesn't work - result ? many small plates, all labelled.   

       // think outside the bun a little //   

       Heh heh   

       Writing on the crust is awkward, there's not a lot of space, and if the dye has any tendency to bleed then it quickly becomes illegible, particulalrly if the sandwich contents are moist (this has been tried).   

       [xen], that's a really good idea actually, you should post it.
8th of 7, Aug 03 2009

       If you try this, use a new one. I'd expect small amounts of lead to be stuck to a used soldering iron, and eating lead is a bad idea, especially for kids.
jutta, Aug 03 2009

       I thought it was going to be a breadstick with a Bic innard for healthier pen-end nibble facilitation.
theleopard, Aug 03 2009

       No, that would be "Edible breadstick pen"   

       // eating lead is a bad idea, especially for kids //   

       Ooooh, thanks for the tip .....   

       // a soldering iron //   

       It's got a very slow marking rate, unless the tip is extremely hot. A gas micro-torch works better but leaves quite a wide track, and tends to dry the bread somewhat - the objective is marking, not toast.   

       However, a pre-shaped "branding iron" would work well if it could be raised to red heat. A simple "dot code" could be applied to indicate fillings.   

       A medium power IR laser would be OK but is expensive and not specially portable. But it would be accurate and versatile enough not merely to burn letters into the surface but graphic designs and barcodes.   

       Laser bread printer, anyone ?
8th of 7, Aug 03 2009

       The ink would have fruitarian, vegan, vegetarian, kosher, halal, Nazarite diet compatible, nut-free, low in sugar, wheat-free, fair trade, organic, etc, etc. Otherwise someone would consider it poison.
Aristotle, Aug 04 2009


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