MT-COPPER / MT-BRONZE @DF are our 80% copper filled filaments which are easy to print, sand & polish. With METALS @df you can create the most beautiful objects with real METAL characteristics, such as a 3 x higher weight than PLA @df, a METAL feel & touch and thermal-conductivity.
Due to the high percentage of fillers METALS @df have virtually no shrinkage. A special lubricant increases the flow and prevents METALS @df to adhere to the nozzle.
Finally all above, combined with the correct hardness, results in a filament that can be printed on almost every type of FDM 3D printer available on the market with retraction enabled on nozzles ≥ 0.35 mm.
The MT @df range of filaments, such as MT-COPPER @df and MT-BRONZE @df are quite easy to print on any type of hot-end with any 0.35 or 0.4 mm nozzle although we do recommend a spring loaded extruder with a (hardened) stainless steel nozzle. The high percentage of metal makes the filament abrasive which will result in quick nozzle degradation with regular messing nozzles.
Through extensive testing we can report that retraction does not have to be disabled. it is recommended to first do some tests to check whether your tension settings are perfect when your 3D printer does not have a spring loaded extruder.
Testing shows excellent results on any Direct, Bowden or Hybrid type extruder / hot-end combination.
Post-processing the MT @df range is quite an easy process though manual labour is required when you do not have access to an so called “rock tumbler” which gives the best polished results.
Step 1: A 3D printed Buddha with 90% infill and 0.15 layers
Step 2: This photo shows the Buddha after a quick brushing with a soft messing brush.
Step 3: Photo 3 displays the Buddha after sanding with 600 grid sandpaper and water*
Step 4: During this step of the process we took a Dremel with a polish wheel together with metal polish which results in a shiny metal object. Depending on how much time and effort is put in step 3 & 4 you will have even better results.
Step 5: This step of the process is optional although many people love to have a patina on their printed object for aesthetical reasons**
* Do not worry about the white haze after sanding. This is a byproduct from our included process aid which will be gone after polishing
** A blog post in the future will focus on how to achieve different patina’s.