Note:

1. For optimal inner engraving results, we recommend using K9 crystal balls with diameters ranging from 60 mm to 100 mm, along with a glass cup with a diameter of 120 mm.

2. The size of the crystal ball determines the size of the container that needs to be prepared. A crystal ball that is too large will exceed the inner engraving work area of xTool F2 Ultra UV, and any part that falls outside the inner engraving work area cannot be processed by the laser.

3. The container must have a diameter larger than that of the crystal ball and a height greater than the combined size of the crystal ball and its base. This ensures that when the inner engraving oil is poured in, it can fully submerge the crystal ball without spilling over the edges of the container.

4. The bottom of the container must be flat. An uneven bottom can affect the stability of the crystal ball in the container, potentially causing it to shift during inner engraving.

5. Wear gloves and avoid leaving fingerprints or other marks on the surface of the crystal ball, as this could affect the inner engraving quality.

Note:

1. The crystal ball must be securely fixed within the container. Use a fixed base at the bottom to assist with stabilization. If additional fixation is required, items can be used to press against the sides of the crystal ball to ensure it is completely secured in the container. Be careful not to place any objects that obstruct the top of the crystal ball, as any obstruction above the crystal ball will block the laser and interfere with the engraving process.

2. The oil is used to maintain consistent laser focus during the engraving process on the crystal ball, ensuring the engraving effect remains accurate. When pouring oil into the container, make sure the crystal ball is fully submerged. It is recommended that the oil level be approximately 2 mm above the surface of the crystal ball.

3. The inner engraving oil must have the following characteristics: a refractive index close to that of glass, high transmittance, non-toxic and harmless properties, and ease of handling. Based on the refractive index, glycerin, liquid paraffin, and benzyl alcohol (mildly toxic) are suitable options for inner engraving oil. The refractive indices of glycerin, liquid paraffin, and benzyl alcohol are 1.473, 1.467-1.478, and 1.538, respectively.

Note: The inner engraving lens comes in several color versions, and the exact color depends on the product you receive.

Note: The riser can assist in calibrating the device's laser and help determine the position for software modeling.

Before placing the container on the riser top plate, please check whether there are bubbles in the inner engraving oil above the crystal ball. If bubbles are present, allow the inner engraving oil to sit for a few minutes until the bubbles dissipate before placing the container; otherwise, it may compromise the engraving quality.

Note: If "Use K9 Crystal Ball Inner Engraved Kit" does not appear in xTool Studio, scroll down to locate it.