| Bond Paper | thin crisp paper made from linen fiber. | ||
| Die | The piece of metal upon which a stamp design has been engraved. | ||
| Die Proof | A Proof in color of issue. | ||
| Essay | An impression showing a trial design of all or part of a stamp. | ||
| Goodall Proof | Proofs attributed to Albert Goodall, president of the American Bank Note Co. 1874-1887 | ||
| For more details and examples see Notes | |||
| Hardened Proof | A Die Proof with imprint and die number. | ||
| Taken from the Die after it has been hardened and can no longer be retouched. | |||
| Often there are holes drilled in the Die to assist in the hardening process. | |||
| India paper | A thin, soft, white, absorbent paper made from bamboo. | ||
| Large Proof | A Proof with margins large enough to show the full die. | ||
| Plate Proof | An impression taken of a complete sheet of stamps. Usually printed on India paper. | ||
| Progressive Proof | Any impression taken from an incomplete version of a final die. | ||
| Small Proof | A Proof that has margins greater than those of a stamp but less than the size of a die. | ||
| Stamp Size Proof | A Proof whose margins have been reduced to that of a regular stamp. | ||
| Trade Sample Proof | A salesman's sample sheet prepared by the American Bank Note Company | ||
| Only 10 or 12 complete sheets are thought to currently exist | |||
| The sheets were printed in numerous pastel shades using ink that fades easily | |||
| For more details and examples see Notes | |||
| Trial Color Proof | A Proof printed in any color except color of issue | ||
| Unhardened Proof | A Die Proof with imprint but not Die number. | ||
| Taken from a Die that has nor yet been hardened, and thus cam still be retouched. | |||
| Vignette | The central figure on a stamp. Usually a portrait of the King or Queen. | ||
| Wove Paper | Paper made on a screen of closely woven wire. | ||
| Usually presents an appearance of small dots when held up to light. |