Golden Pine Brand Preserved Duck Eggs

Golden Pine Brand Preserved Duck Eggs

　　Golden Pine Brand Preserved Duck Eggs

　　The Golden Pine Brand Preserved Duck Eggs are a traditional specialty product of Xinghua. The eggs are crystal clear with pine flower patterns scattered throughout, offering a visual delight. They have won multiple provincial and ministerial-level awards as famous, special, and high-quality products.

　　Golden Pine Brand Preserved Duck Eggs have a rich and mellow flavor that remains delicious even after prolonged consumption. They serve both as an ideal gift for family and friends and as an essential highlight at banquets.

　　Ingredients formula: Fresh duck eggs

　　100 kilograms

　　Water 45–57.5 kilograms

　　Caustic soda 2–3.2 kilograms

　　Quicklime 12 kilograms

　　Black tea 1.2–1.5 kilograms

　　Salt 3.75–4 kilograms

　　Plant ash (containing about 5% potassium oxide) 30 kilograms Production method:

　　1. Weighing: Accurately weigh the required quantities of all processing materials based on the number of fresh duck eggs to be processed. Since the quality of purchased materials often varies, small-scale tests are needed to determine the exact amounts. Weighing must be precise.

　　2. Brewing brine: Place clean cold water in a pot, add black tea powder or tea residue, tea stems, and tea threads, bring to a boil, then filter out the residue to obtain black tea juice, commonly known as tea brine.

　　3. Dissolving lime: Pour the tea juice into a vat (reserving 10% of the tea juice), then add caustic soda and stir slightly until dissolved. Next, add quicklime gradually in batches while stirring continuously. Be careful not to let the boiling brine overflow—excessive or overly reactive lime can cause this. In such cases, adding a bit of salt to the pot can help. Once the lime is fully dissolved, remove the lime residue and rinse it with the reserved 10% of the tea juice. After draining, weigh the residue and add more lime according to the weight difference. Pour any leftover tea juice used for rinsing back into the vat, add salt, and stir until dissolved.

　　4. Mixing ingredients: Pour the dissolved brine into a mixer, add half the amount of plant ash first, start mixing, then gradually add the remaining plant ash while continuing to blend. When the mixture becomes uniform without visible raw ash and assumes a paste-like consistency, spread it on a cement floor, level it, and allow it to cool slightly before cutting it into rectangular blocks weighing 15–25 kilograms each. Use a shovel to transfer the blocks near the mixing machine and let them cool thoroughly.

　　5. Mashing: Crush the cooled blocks of material into smaller pieces with a shovel, then feed them one shovel at a time into the mashing machine to create a well-blended paste suitable for wrapping (coating the eggs). Before and during wrapping, ensure the paste is evenly mixed and neither too hard nor uneven in texture or prone to leaking brine.

　　6. Coating the eggs: Strictly control the amount of paste used per egg. The typical ratio is 1:0.65—that is, for a 50-gram egg, use 32.5 grams of paste, allowing a tolerance of ±1.5 grams, with a maximum of 34 grams and a minimum of 31 grams considered appropriate. Scoop the paste from the container’s edge, spreading it onto the egg in a comb-back or crescent shape. Wear gloves during the process. The paste should be evenly applied, neither too loose nor too tight, with no uneven thickness (no half-thick, half-thin areas), no thicker ends or thinner middle, and no exposed shell (“window”) areas. After coating, gently place the eggs into a basket filled with rice husks, avoiding stacking to prevent sticking, wrinkling, or cracking.

　　7. Rolling in bran and loading into jars: Rolling in bran means rolling the coated eggs in rice husks (referred to as bran in southern regions) to ensure the husks adhere firmly to the paste. Once coated, load the eggs carefully into jars, placing them horizontally and evenly to keep the yolk centered—avoid vertical placement that might cause the yolk to float and affect quality. Jars must be clean, free of impurities, odors, or moisture, and filled to the required level without overfilling or underfilling.

　　8. Sealing the jars: Handle semi-finished preserved eggs gently during moving or stacking to prevent the paste from sagging, deforming the eggs, and compromising appearance and quality. The sealing blood paste should be made with fresh pig blood mixed with an appropriate amount of powdered lime into a slurry. If the paste turns red, it indicates insufficient lime; if it turns white, too much lime has been used; if it turns greenish, the lime amount is just right. This paste is highly adhesive and seals tightly without peeling easily. Jar lids must be sturdy, dry, mold-free, and odorless. Seal the jar opening tightly to prevent air leakage, and affix labels indicating date, grade, and worker ID both outside and inside the jar.

　　9. Storage: Store sealed preserved eggs in warehouses that are cool in summer and warm in winter, avoiding low, damp, sun-exposed, stuffy, poorly ventilated, or leaky spaces. Maintain a temperature of around

　　20°C. Newly processed preserved eggs should not be moved within half a month, as the whites are still setting—shaking during this period could affect their consistency and overall quality. When stacking jars, ensure stability and neatness. For stacks of 4–5 jars high, place a wooden board between layers as a base to maintain balance and prevent lid breakage. In less-than-ideal storage conditions, ensure ventilation in summer to avoid excessive humidity and direct sunlight, and focus on insulation in winter.

　　10. Quality inspection: First, inspect a general sample. Timing depends on ambient temperature—for temperatures between 4.4–10°C, inspect after 17–20 days; for 26.7–32.2°C, inspect after 8–10 days. Second, conduct regular spot checks. To monitor maturation, regularly test and determine the optimal time to remove eggs from jars. Typically, spring-processed eggs take about 50–70 days; autumn-processed, 60–80 days; summer-processed, 30–40 days; and winter-processed, over 100 days. Spot checks are generally done monthly, starting with shaking tests followed by shell hardness checks. High-quality eggs usually produce a resonant sound when tapped, feel elastic, peel cleanly, and have glossy, transparent whites (greenish for autumn eggs, brownish for spring eggs), with clearly visible and attractive pine flowers and normal “sugar hearts.”

　　11. Egg shaking: Upon reaching maturity, to ensure product quality, organize thorough shaking inspections. This is the final checkpoint in the preservation process—negligence here can lead to poor final quality. Shake eggs correctly, primarily by tapping and secondarily by feeling their movement. Good eggs produce a resonant tap and a springy feel; intact eggs sound like “dong dong dong” when tapped and rustle when shaken; spoiled eggs sound dull on one end and hollow on the other; dry hollow eggs sound hollow with uneven weight distribution; incompletely set eggs produce a “tapping” noise when shaken; rotten eggs emit a sound like flowing kerosene, with no solid yolk movement felt; cracked eggs produce a muted sound when tapped. Through tapping and shaking, eliminate substandard eggs as well as those with mold, exposed shells, overly dry paste, deformed shapes, or abnormally light weight—all of which can compromise internal quality and market appeal.

　　12. Finished product packaging: After shaking and selecting high-quality preserved eggs, package them by grade, seal them, and store them for transport and market sale.

　　Product features: Firm whites with a transparent texture, bright color, prominent pine flowers, and a hard yolk center. The flavor is moderately spicy, fragrant, refreshing, delicious, nutritious, and easy to digest—making it an excellent dish for banquets.