×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Food Contact Safe Coating & Application Method

Food Contact Safe Coating & Application Method

Food Contact Safe Coating & Application Method

(OP)
Hi all,

I am about to start producing a range of cast iron salt & pepper mills for sale online. The design was inspired from a 1960's Robert Welch pepper mill that I inherited from my grandparents.

I would greatly appreciate any help with selecting a coating that is suitable for direct food contact to coat the inside of the mills and any advice on the application method that would be suitable. Ideally the coating chosen would be certified for use in Europe, America, Australia, Canada and other countries also.

My preferred design the mill body is cast in one piece but I think this will be quite hard to coat the internal void? I have drawn up a second design where there is a removable base plate in the bottom to allow access to the inside (see attached cross section drawings). I would prefer to avoid the second option as this will add machining and assembly operations. I guess it will come down to which costs more.

Any help appreciate - Thanks all!

RE: Food Contact Safe Coating & Application Method

What do you expect the coating to do? Cast iron cookware is typically coated in vegetable oil and then baked at high temperature. Vegetable oil has alkyds much like alkyd enamel paint.

RE: Food Contact Safe Coating & Application Method

Whatever coating you pick will have to stand up to the abrasion of peppercorn chunks and salt...tough call.

What's wrong with seasoned cast iron as Tugboat suggests, or bare iron on the internals with whatever cosmetic coating you want on the outside?

Alternatively, have you looked at having the castings done in a stainless steel, or Nickel/Chrome cast iron, either of which will tend to be rust free in use.

RE: Food Contact Safe Coating & Application Method

Cast Iron cookware, for example Le Creuset, have an enamel coating usually in quite bright colours. Might be worth considering accepting salt and pepper pots and not going to actually go on the cooker it might match expectations of the customer.

CHeers

Graham Gedge

RE: Food Contact Safe Coating & Application Method

Assuming you want to present them with a uniformly black surface, perhaps you should be talking to a Blackening service company or to Blackening suppliers for your own production line. Hot Blackening is probably the method you might pursue.

RE: Food Contact Safe Coating & Application Method

There is also electroless nickel plating that is available in black.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close