Artificially Aged Mimeo

Some people have an issue with reproductions.  They look too new and shiny.

There are many techniques that are used to “age” components.  I will explain what I did for to make the difference between the two Mimeo boards in the picture below.

Note: If you try this at home, I take no responsibility for damage or injury so please use common sense.

The idea behind using Rit Dye to colour fiberglass is not new.  Car guys have been using it for a while to change the colour of bits on their cars.  The trick with a PCB however is how to dye a board that is as large as a Mimeo.   I used a turkey pan and my large 6 burner outdoor propane BBQ.  I also cleaned up the board when I was done using Nevr-Dull chrome polish wadding and wiped it down using 93% ISP a few times to remove excess rit dye that wasn’t absorbed.   

Note: Wear nitrile gloves the whole time to avoid staining your hands.

The procedure was simple.  Take 2 boxes of Rit grey dye.  Mix them with boiling water in a clean pickle jar.  Fill the turkey pan about 1” of boiling water and mix in the dye using a wooden paint stick. Tip: Use a thick solid wire, threaded through the regulator screw holes to make a handle to pick up the board when it is submerged. Next add the Mimeo board making sure it is complety in the dye and place it on a preheated the propane grill at 400 degrees making sure the flames do not come near the turkey pan.  This was about 50% power for my BBQ burners.  I also set the extreme side burners to full but they don’t come near the pan.  

The water in the pan should be boiling pretty soon.  Keep it boiling and check every 10 to 15 minutes to see if you need to add more boliling water.   You can also lift of the board to check it at the same time using a set of heat resistant plastic tongs and the wire you placed.  I avoid the metal ones, they can scratch the board.  I do find it easy to also use the wooden paint stick to lift it higher once I use the tongs to get the board raised.

At about 30 minutes, I added a bottle of liquid Rit Dark Green dye.  If I wanted the board greener, I would have added this in the beginning and not used the grey.

Boil for another 30 minutes for 60 minutes total, then turn off the grill.

I let the board sit in the pan with the dye until it cools down a few hours later, then I remove the board, wipe it down with paper towels.  Rise under cold water then wipe is down with 93% ISP a few times.  Gran the Nevr-Dull and buff the metal areas.

Let you board sit for about a day to make sure everything internally is dry.  I noticed the board looks a little different the next day.  If it’s not dark enough, repeat the process. 

Artificially Aged Mimeo

Some people have an issue with reproductions.  They look too new and shiny.

There are many techniques that are used to “age” components.  I will explain what I did for to make the difference between the two Mimeo boards in the picture below.

Note: If you try this at home, I take no responsibility for damage or injury so please use common sense.

The idea behind using Rit Dye to colour fiberglass is not new.  Car guys have been using it for a while to change the colour of bits on their cars.  The trick with a PCB however is how to dye a board that is as large as a Mimeo.   I used a turkey pan and my large 6 burner outdoor propane BBQ.  I also cleaned up the board when I was done using Nevr-Dull chrome polish wadding and wiped it down using 93% ISP a few times to remove excess rit dye that wasn’t absorbed.   

Note: Wear nitrile gloves the whole time to avoid staining your hands.

The procedure was simple.  Take 2 boxes of Rit grey dye.  Mix them with boiling water in a clean pickle jar.  Fill the turkey pan about 1” of boiling water and mix in the dye using a wooden paint stick.  Using a thick solid wire, threaded through the regulator screw holes to make a handle to pick up the board when it is submerged. Next add the Mimeo board making sure it is complety in the dye and place it on a preheated the propane grill at 400 degrees making sure the flames do not come near the turkey pan.  This was about 50% power for my BBQ burners.  I also set the extreme side burners to full but they don’t come near the pan.  

The water in the pan should be boiling pretty soon.  Keep it boiling and check every 10 to 15 minutes to see if you need to add more boliling water.   You can also lift of the board to check it at the same time using a set of heat resistant plastic tongs and the wire you placed.  I avoid the metal ones, they can scratch the board.  I do find it easy to also use the wooden paint stick to lift it higher once I use the tongs to get the board raised.

At about 30 minutes, I added a bottle of liquid Rit Dark Green dye.  If I wanted the board greener, I would have added this in the beginning and not used the grey.

Boil for another 30 minutes for 60 minutes total, then turn off the grill.

I let the board sit in the pan with the dye until it cools down a few hours later, then I remove the board, wipe it down with paper towels.  Rise under cold water then wipe is down with 93% ISP a few times.  Grab the Nevr-Dull and buff the metal areas.

Let you board sit for about a day to make sure everything internally is dry.  I noticed the board looks a little different the next day.  If it’s not dark enough, repeat the process. 

You can contact me at corey@myapplecomputer.net

www.myapplecomputer.net