Kai Parthy Reflect-o-Lay

Reflect-o-Lay is a grey semi flexible filament with ‘retro-reflective’ pigment (~0.050 mm) that reflects light and has the feel of pumice stone.

Manufacturer's Recommended Settings - Personal Preferred Settings Nozzle Temperature 210°C 215°C Bed Temperature 20 - 60°C 40°C Speed (mm/s) ?mm/s 15mm/s Cooling Fan Speed ?% 50% Max Flow Rate ?mm3/s at ?°C 1mm3/s at 212°C Retraction None Other Specifications - - Density 2.31g/cm3 (Filament) Printed 1cm3 = 1.23g/cm3 Diameter and Tolerance 2.80 - 2.83 ± ?mm - Flexy Modulus - Glass Transition Temp ?°C Bed Adhesive Glue or Hairspray -

1cm3 test piece, 10.08x10.02x9.90 (mm) (XYZ), weight 1.23g. Density = 1.23g/cm3. It has a filament weight of approximately 14g/m (Ø2.80) (2.31g/cm3).

Temperature: printed nicely between 220°C and 210°C started to see a reduction in the surface finish below 210°C and failed at 195°C.

Speed: printing speed was typical for flexible filaments at about 15mm/s above 20mm/s could cause a little under extrusion, in general required an increase in the feed rate to ~120%.

Volumetric Flow: with a low print speed it has a low volumetric flow rate only managing 1mm3/s failing at 1.5mm3/s with under extrusion.

Preferred settings: typical layer height 0.2mm, initial layer height 0.3mm, speed 15mm/s (30% if 50mm/s typical), with no retractions, a little oil in the Bowden tube will help reduce the friction. Prints well with both standard Brass and Ruby nozzles, although typical of semi-flexible filaments excess can gather on the nozzle. Printed surface has a grey surface that has a sparkly effect when illuminate, although any surface that has been post processed by filing has a dull look and doesn’t reflect.

Ultimaker Robot: the bridging on the Ultimaker robot suffered from the poor bridging and small or slight details can be lost, not liking retractions the small antenna on the head suffered loss of definition but nothing from the normal for flexible filaments.

Tree Frog: it printed the overhang of the tree frog well but needs 3 wall thickness to hang onto and build upon, the weight of the filament hampers bridging as the filament strand sags, like the majority of flexible filaments, it doesn’t handle retractions well and can lead to under extrusion, so either no retractions or only sight retractions. Printed a nice model.

3DBenchy: forgot to turn of the retractions for the 1st build, and so started to show under extrusion at the midlevel of the wheelhouse. The 2nd build without retractions, built well, although without retractions it shows signs of stringing.

Shrinkage - Length % Width % Height* % Dimension 60mm - 31mm - 32.5mm - Measurement and % Difference - - - - - -

*As the vertical height can be effected by the distance of the bed-levelling to the nozzle the height of the “Top of the Chimney to the top of the box” should be more accurate for the comparisons

Testing performed on an Ultimaker2, With a Modified ‘Roberts’ Feeder, an Olsson Block running a 35W heater and using a 0.4mm nozzle.

(June 2016) (December 2016) Printer Spec added

Ian Hiscocks

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kay parthy reflect o lay filament review