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Notebooks
A premium 140-page spiral notebook featuring the Chladni Mandala mathematical pattern. Includes an elegant printed equation at the bottom. Perfect for mathematics, physics, and journaling.
Price
$30.00
✓ Free worldwide shipping
Care
Each print is produced and shipped from the nearest facility in our global print network. Production normally takes 2–5 business days, then shipping follows Printful's live estimate for the destination. The ranges below are current standard-rate estimates and can vary by exact address, product, and carrier availability.
| Region | Countries | Est. delivery |
|---|---|---|
| United States | All 50 states + territories | 3 – 6 business days |
| United Kingdom | UK | 2 – 11 business days |
| Canada | Canada | 2 – 10 business days |
| Australia | Australia, New Zealand | 3 – 17 business days |
| European Union | Germany, France, Spain, Italy, Netherlands, Belgium, Austria, Sweden, Poland, Denmark, Finland, Ireland, Portugal, Czech Republic, Romania, Greece + more | 3 – 15 business days |
| Norway & Switzerland | NO, CH | 3 – 15 business days |
| Latin America | Brazil, Mexico, Chile, Colombia, Argentina, Peru + more | 5 – 25 business days |
| Asia Pacific | Japan, South Korea, Singapore, India, China, Hong Kong, Taiwan, Malaysia, Thailand, Philippines + more | 2 – 20 business days |
| Middle East | UAE, Saudi Arabia, Israel | 5 – 20 business days |
| Rest of world | Most supported countries and territories | 5 – 25 business days |
Note: Shipping is free worldwide — already included in the price, with nothing added at checkout. Delivery times are estimates and not guaranteed. Shipping is unavailable for Russia, Belarus, Cuba, Iran, North Korea, and Syria.
Shipped worldwide · professionally printed and fulfilled
The mathematics
Chladni figures are the nodal patterns of a vibrating plate, first demonstrated by Ernst Chladni in 1787 by drawing a violin bow across a brass plate covered with sand. The sand migrates to the nodes — the lines where the plate isn't moving — revealing the underlying eigenmode of vibration. Mathematically: Z(x,y) = sin(mπx)·sin(nπy) + sin(nπx)·sin(mπy) for integer mode numbers m, n. This image is the literal level-set rendering of one such eigenmode sum.