1. A die-casting mold core, comprising:
a mold body made of a steel alloy composed of carbon, chromium, manganese, silicon, vanadium, and iron, the mold body having a molding surface;
an intermediate layer formed directly on the molding surface of the mold body, the intermediate layer being comprised of a material selected from a group consisting of chromium, titanium, chromium titanium, and chromium nitride; and
a diamond-like carbon film formed directly on the intermediate layer, a molar percentage of hydrogen in the diamond-like carbon film being in a range from 2% to 25%.
2. The die-casting mold core as claimed in claim 1, wherein the steel alloy of the mold body comprises 0.2%\u02dc0.5% by weight of carbon, 3%\u02dc15% by weight of chromium, 0.2% and 0.8% by weight of manganese, 0.5%\u02dc2.0% by weight of silicon, 0.2%\u02dc2.0% by weight of vanadium, with remainder being iron.
3. The die-casting mold core as claimed in claim 1, wherein the percentage of hydrogen in the diamond-like carbon film is in a range from 5% to 15%.
4. The die-casting mold core as claimed in claim 1, wherein a thickness of the diamond-like carbon film is in a range from 100 nanometers to 2000 nanometers.
5. The die-casting mold core as claimed in claim 4 wherein the thickness of the diamond-like carbon film is in a range from 500 nanometers to 1000 nanometers.
6. The die-casting mold core as claimed in claim 1, wherein the intermediate layer has a thickness in a range from 2 nanometers to 30 nanometers.
7. The die-casting mold core as claimed in claim 6, wherein the intermediate layer has a thickness in a range from 5 nanometers to 20 nanometers.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A musical guide for learning how to play a guitar, comprising:
a series of musical notes, chords, or scales for learning how to play the guitar;
wherein said musical guide is sized to be placed on a forearm of a user in the form of a temporary tattoo;
wherein said musical guide being portable and useable for learning said series of musical notes, chords, or scales separately from the guitar.
2. The musical guide of claim 1, wherein the notes, chords or scales are oriented on the tattoo in vertical columns.
3. The musical guide of claim 1, wherein the tattoo is in the form of the circle of fifths.
4. The musical guide of claim 1, wherein the tattoo is rectangular in shape.
5. The musical guide of claim 4, wherein the tattoo is sized to be between about 1-6 inches in width by 4-10 inches in length.
6. The musical guide of claim 1, wherein the tattoo is circular in shape.
7. The musical guide of claim 6, wherein a diameter of the tattoo is between about 1-6 inches.
8. The musical guide of claim 1, wherein the scales, notes or chords are color coded.
9. The musical guide of claim 8, wherein each note is given a unique color.