> For the complete documentation index, see [llms.txt](https://treves-studios.gitbook.io/bm-learning-center/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://treves-studios.gitbook.io/bm-learning-center/inking-and-extensions/inking.md).
# Inking
Every tattoo on BirthMark, that is listed or on live auction, has an expiration date for its real life application, within the Properties section. Buyer is expected to contact the artist within that period and schedule an appointment for inking.
Every tattoo sold on BirthMark comes with the promise of its real life application. Artist is responsible for setting an appointment for the buyer within that period, and inking the tattoo on collector’s skin at no extra cost.
Artists are responsible of inking the tattoos they have sold at no extra cost to their collectors
On the day of inking, collector clicks on the “Get inked!” button on the NFT page. As a result, Properties section of the tattoo is updated and the transaction is fully completed including its real life application.
Get Inked! button
All new tattoos have **Pristine** status at creation. Once a tattoo is inked once in real life, its status is changed to **Inked** through a blockchain transaction.
{% hint style="info" %}
**Tip:** Once a tattoo’s status turns to **Inked**, it can never turn back to **Pristine** again.
{% endhint %}
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