Table 3. Effect of LFP Developed by Different Powders on Obvious Objects^a.

	powder
object	P-MNP@Ag	S-MNP@Ag	silver powder	gold powder
metal	+++	+++	+++	+++
paper	+++	+++	+	++
plastic	+++	++	+	++
leather	++	++	+	+

^aThe development effect is divided into five levels: “++++”, too thick to have an appraisal value; “+++”, excellent and with an appraisal value; “++”, qualified but with an appraisal value; “+”, developing LFP and no appraisal value; “–”, unable to develop LFP.