Ritchie Feenie from Kinghorn Creative was asked to design and create six sign posts for Kinghorn Community Land Association. He asked if I could advise him on design and then laser engrave the sign posts.
Style of post
Ritchie sent me some pictures of how he wanted the posts to look. He wanted them to be square in profile and a metre high, but he wanted the tops cut at an angle with engraving on the angled surface. Would this be possible?
I knew this would be tricky as the posts would have to be propped up in the machine to make the angled surface horizontal, and the posts would have to be limited in length to 1300mm to fit inside the machine.
Then Ritchie had an idea. If we had engraved metal plates on the angled surfaces, we wouldn’t need to put the posts in the laser for engraving so we wouldn’t have to worry about their size. I could order stainless steel plates and engrave them much more easily.
We decided to use green oak or larch for the posts as they’re great for outdoor use without treatment. As larch was the cheaper option, Ritchie settled on that.
Deciding on the artwork
Initially, Ritchie’s customers wanted all the engraving to be on the stainless steel plaques. Ritchie sent me a proposed design. My initial thought was that too much detail was squeezed onto the plates. I was worried that the details could be too fine for good engraving results, especially on the Lottery logos. As the project was lottery funded, the logos needed to be well defined and easy to read.
As nothing that could be lost from the design, Ritchie suggested to his customer that some of the engraving could be on the wood under the metal plates. It was agreed that this would be a good place for the Lottery logos that could be made much larger and clearer.
Creating waymarking posts
Ritchie ordered six 1300mm larch posts and brought them to the workshop for engraving, and the Lottery logos came out as well as I’d hoped. I put the posts sideways into the laser, dropping the machine bed to suit the depth of the posts. Then, I engraved the logos sideways onto them to they were in the right orientation on the posts.
I ordered six metal plates in marine grade stainless steel plates. It’s ideal for coastal locations as it can withstand salty conditions without corroding. We decided to get plates with radiused corners to make the corners rounded to match the edges of the posts.
To achieve an engraving on stainless steel, I spread Thermark paste onto the plates, let it dry and then engrave. Thermark leaves a weatherproof, abrasion resistant enamel mark where the laser has melted the glass particles and trapped black pigment onto the metal surface. You can one of the plates after engraving in the picture above. Excess Thermark is then removed, leaving the shiny plate with a high contrast engraving.
Once I had glued the plates onto the posts, they were ready for Ritchie to install.