The reasons for the low resistance of the resistive wire printed with silver paste are as follows: 
1. Incorrect printing process: When applying the silver paste to the resistance wire during the printing process, if the process is improper, such as uneven printing pressure or excessive printing speed, it will result in an uneven thickness of the silver paste on the resistance wire, thereby affecting the stability and accuracy of the resistance value. 
2. Quality issue of resistance wire silver paste: The quality of the resistance wire silver paste also affects the stability and accuracy of the resistance value. If the composition of the resistance wire silver paste is uneven or the impurity content is too high, it will result in a lower resistance value. 
3. Temperature and humidity variations: The resistance value of the resistance wire silver paste is affected by temperature and humidity. If the environmental temperature and humidity change significantly, it will result in a lower resistance value. 
4. Metal Oxidation: The metallic materials in the silver paste for the resistance wire are prone to oxidation, which can affect the stability and accuracy of the resistance value. Therefore, when printing the silver paste for the resistance wire, it is necessary to pay attention to the control of the printing process, the quality inspection of the silver paste for the resistance wire, and the control of environmental conditions, in order to ensure the stability and accuracy of the resistance value.