युगतालकप्रमाणं विमलीकृतं रसेशम् । द्विगुणां खटीव्च शुद्धां निदधीत खल्वमध्ये ॥६॥ 
परिपेषयेत्तु तावत् विधिनेतदीयचूर्णम् । अवलोक्यते न यावत्खलु चन्द्रिकाविहीनम् ॥१०॥ 
हतचन्द्रिकं तु चूर्णं हि अवबुध्यः योजयेद्वै । विबुधैः स्मृतो रसोऽयं खलु मुग्धनामधेयः ॥ ११ ॥ (R T 6/9-11)

REFERENCE – Rasatarangini 6th Taranga shloka number 9-11
INGREDIENTS

INGREDIENTS	QUANTITY
Shudha Prarada	yuga taala (4 tola/ 2 tola )
Shudha Khatika	dwiguna

Yuga implies chatur yuga hence yuga taala means 4 taala/tola. So Parada taken in 4 tola quantity is done mardana with 8 tola (double quantity) of Khatika churna in Khalwa yantra until entire globules of Parada completely merges to it and shining particles are not seen.In commentry, it is mentioned to take 2 tola Parada along with 4 tola Khatika for mardana.

DOSE

Adults – 1/2 to 2 1/2 ratti

For 1 year old child 1/8 – 1/4 ratti