Fig. 5. Rewritable security printing from 1/ATP/ALP. (A) Cartoon representation of the fabrication of the star-shaped 3D model. (B) Photographs of the prepared 3D model with time-dependent emission enhancement behavior (0–20 min), derived from the transient co-assembly of 1/ATP mediated by ALP ([1] = [ATP] = 2.0 × 10⁻⁵ M and [ALP] = 0.80 U mL⁻¹). Scale bar: 5 mm. (C) Schematic illustration of the rewritable security printing. (D) Photographs of the printed patterns: (i) the pattern printed with the aqueous solution of 1 as the ink; (ii) the QR code pattern printed with the inks of ATP/ALP at the same location of (i); (iii) and (iv) the time-encoded erasing of the patterns for 5 min and 10 min, respectively; (v) the reprinted logo pattern with the inks of ATP/ALP at the same location of (iv); (vi) the reprinted “NPU” pattern with ATP/ALP inks ([1] = [ATP] = 2.0 × 10⁻⁵ M, 0.80 U mL⁻¹). Scale bar: 5 mm.