Example set of SN model SEDs with unrecognisable dust signatures. Each symbol represents a synthesised magnitude by a JWST filter and is shown at its central wavelength. The filled circles and triangles correspond to the SN model SED 1 and 2, that contain silicate dust, while filled dash and downward triangles correspond to SN model SED 3 and 4, respectively, both contain a mix of silicate and carbon dust. The amount and the temperature of dust in the SN model SEDs one to four, are about 2 × 10⁻⁵ M_⊙, 314 K, 5 × 10⁻⁵ M_⊙, 329 K, 10⁻⁵ M_⊙, 620 K, 10⁻⁵ M_⊙, 617 K respectively.