La Pavoni Coffee Spoon

@LucasS I understand what you are saying...but...
This object is not in contact with liquid. Fungi and bacteria live and multiply in the presence of water.
For this reason, drying is an ancient preservation method.
Because the coffee grounds are dry and even roasted, they do not spoil in the grooves of the printed object.
For this reason it is unnecessary:
- Grinding
- to paint
- Washing dishes
Plastics have been in our lives for decades. They're not very healthy, they may have shaved a year off everyone's life... but what would we do without plastics?
I propose a less anxious and less scientific approach.
*** Translated with www.DeepL.com/Translator (free version) ***

@DVS_262302 I understand what you are saying.
If you get yourselve a microscope and take a "closer" look you might as well redefine "negligible" in this context.

Science:
"Previous research has proven that, by default, 3D printing object is not food safe after longer usage and direct contact with food (even the food safe filaments were used."[ https://ojs.bibl.u-szeged.hu/index.php/analecta/article/view/44893/43564]

"It is also important to consider if the 3D printed parts can be smoothed out in post-processing, if they are dishwasher safe, and if they can be used with hot liquids."[ https://www.proquest.com/openview/0ee3530ae5c96a9d5ae97c4262aeaa83/1?pq-origsite=gscholar&cbl=18750&diss=y]

"..... emphasizing the benefit of physical (heat-based methods) over chemical cleaning."[ https://ojs.bibl.u-szeged.hu/index.php/analecta/article/view/44893/43564]

@LucasS No need for a magic printer. If you take enough time to calibrate, the undesirable phenomena listed are so minimal as to be negligible.
The second requirement is a versatile, modern slicing software, I use OrcaSlicer.
In OrcaSlicer, there are many fine-tuning options to eliminate Stringing or oozing- Scars or drips- Side layer surface issues- Clumping.
To keep it dry I use a lidded box that holds 10 rolls and 1kg of silica gel to keep it dry, which I dry in the oven every month.
My print is lint free and smooth.
Since it is a ground coffee dispenser, it will not come into contact with any moisture or perishables.
The sanding, surface treatment would be needed when printing beverage cups, tablespoons, etc.
But it's a dry ingredient dispensing spoon. Don't overthink it! The stress of dying from plastic will kill you faster than the plastic itself.

The spoon in the pictures has not been reworked. I printed with Azurefilm PET-G at 230C on a table at 80C, sliced with an OrcaSlicer.
I had to cut it down from the height because it was too much for one portion (8,8 grams so it became 6.8 grams).

@LucasS Thanks for sharing the picture, I like the smooth radii of the handles! :-)

@BikeCyclist That's a cool idea, I once did some spoons for detergent powder for a company I work with. If using wood, i would recommend cleaning it like wooden cutting boards (no dishwasher, etc.). you can oil it or wax it with food-grade stuff. Or you just mill a new one if its dirty :)

@LucasS Thanks a lot for the detailed explanation! :-) I have been quite hesitant to use printed stuff in contact with food, but I admit I hadn't considered the factors you listed when printing coffee (and tea) metering spoons.

Maybe it would be better to CNC them from wood? It seems to be quite a common material in kitchen utensils that come into direct contact with food.

@BikeCyclist, thanks for your comment.
Maybe @DVS_262302 has a magic printer but with my printer (and most other printers) it is inevitable that you get some of, or all of the following:

- Holes or Gaps in Top/Bottom Layer (due to mismatched z height or under or over extrusion)
- Stringing or oozing
- Scars or drips
- Side layer surface issues
- Clumping

With PETG especially if it isn't bone-dry

**If you watch your printed part under the microscope you will observe little imperfections caused by one of the above or other.**
Even without mechanical or chemical stress on the part some of them will fall of.

With sanding I can get rid of the biggest imperfections and gaps (gaps can hold bacteria).
Washing afterwards is to remove most of the plastic break-offs and of course the swarf (Schleifspäne/Körner).

Food safety concerns have to do with small amounts of material from the manufacturing process that could leech out of the plastic and make its way into our system. Although PETG in not directly unsafe for food, plastic additives, pigment, unreacted monomers, or anything else from the production process could be!
For more information you can check out this standard: **[European Communities (Plastics and other materials) (Contact with Food) Regulations 2017 (S.I. No. 49 of 2017).]( https://leap.unep.org/en/countries/ie/national-legislation/european-communities-plastics-and-other-materials-contact-food-5)**

@LucasS Then don't grind... PETG is said to be safe, by the way.
Coffee is not a liquid and does not wash away particles like liquids do.
Anyway, if you're worried about your health, I've got bad news: we can't get the toxins out. They are everywhere. In food, water, air.

@LucasS Thanks for the explanation. What's the motivtion for sanding it, instead of using it as it comes off the printer?

@DVS_262302 I washed it once after sanding to get rid of micro-PETG. I like my coffe without a Polyethylene terephthalate glycol flavor :)

@LucasS This is a coffee spoon. I don't understand why it has to be washed.It can be kept in the aroma Closer coffee container. I use it to dispense coffee every time. I don't put it in soup, it doesn't get greasy, it doesn't get milky.No need to wash it.