According to experts, there are certain dos and don’t when preparing the various kind of Yantras:-

1. Yantra should be prepared by experts as it should be flawless and under auspicious timings.

2. For writing Yantra, good quality sheet of paper (unruled) should be used. The best size of the paper should be 6” x 4”.

3. The ink should be prepared by using ashtagandha powder and mixed with Ganga water or river water or well water. Any balance of ink should be used again and thrown in a sacred river along with flowers and grains (horse gram)

4. The ashtagandha should consist of (1) agar (2) tager (3) keshar (4) kasturi (5) pure camphor (6)red sandal paste (7) white sandal paste (8) sindhur (vermillion) or if these items are not available, saffron or sindhur may be used.(Though Astagandha is most effective, Sindhur/Sindoor will not reduce the potency of the Yantra)

5. The pen should be fine tipped and made from the twig of pomegranate tree. Do not use the pen again and should be thrown away after use in a flowing river or flowing water.

6. In writing Yantra, there should be no alternation, overlapping.

7. Auspicious night like Deepavali etc should be used for writing Yantra.

8. The paper/Yantra should be folded carefully and encased in a talisman which can be engraved with the appropriate gods/goddess.